1. Report Industry Investment Rating - Not provided in the report 2. Core Views of the Report - The soda ash futures market is in a volatile stage, with a balanced supply and demand situation, high inventory, and weak downstream demand suppressing prices, while cost support limits the downside. The glass futures market is in a downward trend, with a supply - demand imbalance, high inventory, and a weak short - term outlook. [8][32] 3. Summary by Directory 3.1 Soda Ash Futures 3.1.1 Mid - line Market Analysis - Mid - line trend: The soda ash futures are in a volatile phase. - Trend logic: The domestic soda ash market was stable last week, with prices in some regions slightly increasing. Supply recovered as maintenance facilities resumed operation, and demand was divided (light soda ash was in short supply in some areas, while heavy soda ash was weak due to the decline in the glass industry's operation rate). The cost and pending orders supported the price. The futures price was volatile at a low level, and the supply - demand pattern was loose. - Strategy suggestion: It is recommended to wait and see. [8] 3.1.2 Variety Trading Strategy - Last week's strategy review: The domestic soda ash market was stable, with light soda ash demand being stable and heavy soda ash being weak. Supply decreased slightly due to maintenance but was generally sufficient. The market was in a game between weak reality and strong cost, and it was expected that SA2601 would operate in the range of 1100 - 1250. - This week's strategy suggestion: The soda ash spot market was stable last week, with prices in some regions slightly increasing. Supply gradually recovered, demand was divided, and prices were stable under cost and order support. The futures market was volatile at a low level, and it was expected that SA2601 would operate in the range of 1100 - 1250. [11][12] 3.1.3 Relevant Data - Relevant data includes China's weekly soda ash production, operating rate, light and heavy soda ash inventory, basis (daily), and the production cost of the ammonia - soda process in North China (weekly). The variety diagnosis shows that the main force is slightly bearish, the capital is basically stable, and the risk of a market reversal is high. [13][17][24] 3.2 Glass Futures 3.2.1 Mid - line Market Analysis - Mid - line trend: The glass is in a volatile downward trend. - Trend logic: The domestic float glass market declined last week, with prices in various regions dropping by 20 - 50 yuan/ton. Supply was abundant, downstream demand was weak, enterprises increased their inventory - clearing pressure, and the overall inventory was in an accumulating trend. The futures price continued to hit new lows. - Strategy suggestion: It is recommended to stay in an empty position and wait and see. [32] 3.2.2 Variety Trading Strategy - Last week's strategy review: The domestic float glass market was weak, with prices stable or decreasing. Supply was sufficient, but downstream orders were limited. The cost provided support, but the market lacked positive factors, and the futures market was in a weak and volatile trend. - This week's strategy suggestion: The float glass market was weak last week, with spot prices generally falling. Supply was abundant, demand was weak, and inventory pressure remained. The futures market was in a downward trend, and it was expected to maintain a weak and volatile trend. [35][36] 3.2.3 Relevant Data - Relevant data includes China's weekly float glass production, operating rate, production cost and profit of the float process using natural gas as fuel, basis (daily), and end - of - week inventory. The variety diagnosis shows that the main force is strongly bearish, the capital outflow is large, and the risk of a market reversal is extremely high. [37][42][49]

工业硅、碳酸锂 期货品种周报 01 P A R T 工业硅期货 目录 01 中线行情分析 02 品种交易策略 03 相关数据情况 Contents 中线行情分析 2025.12.01-12.05 工业硅期货目前处于大区间运行。 中线趋势判断 1 趋势判断逻辑 2 上周工业硅现货价格维稳，截至11月28日新疆地区421#价格9200元/吨， 云南地区421#价格9900元/吨，四川地区421#价格10000元/吨。长城期货 AI智能投询品种诊断报告显示工业硅价格日线处在横盘阶段。资金方面， 主力偏空态度较为明显。 预计工业硅2601合约运行区间在8500—10000之中。 中线策略建议 3 品种交易策略 上周策略回顾 工业硅大区间运行，观望为主。 本周策略建议 工业硅大区间运行，观望为主。 相关数据情况 截止至2024年04月19日，上海期货交易所阴极铜库存为300,045吨，较上一周增加322吨。从季节性角度分析，当前库存较近五年相比维持在较高水平。 SHF阴极铜库存走势 SHF阴极铜库存季节性分析 本报告数据来源为Wind、Mysteel、长城期货交易咨询部 相关数据情况 截止至2024年04月19日，LM ...

Report Overview - Report Title: Weekly Report on Rebar and Iron Ore Futures [2] - Report Period: December 01 - 05, 2025 [1] 1. Rebar Futures 1.1 Mid - term Market Analysis - Mid - term Trend: The main contract of rebar futures is in a sideways consolidation range of 2882 - 3330 [7]. - Trend Logic: Weekly production is 2.12 million tons, apparent consumption is 2.33 million tons, major steel mills' inventory is 1.56 million tons, and social inventory is 5.9 million tons [7]. - Strategy Suggestion: Consider a grid trading strategy with an antenna of 3330, a ground line of 2882, a grid spacing of 32, and 14 grids [7]. 1.2 Variety Trading Strategy - Last Week's Strategy Review: The main contract of rebar futures entered an oscillatory consolidation range [10]. - This Week's Strategy Suggestion: Implement a large - grid trading strategy as the contract is in a sideways consolidation range [11]. - Hedging Suggestion for Spot Enterprises: Wait and see until a new mid - term trend becomes clear [12]. 1.3 Relevant Data - Data Sources: Wind, Mysteel, and the Trading Consultation Department of Great Wall Futures [15][20][21] 2. Iron Ore Futures 2.1 Mid - term Market Analysis - Mid - term Trend: The main contract of iron ore futures is in a range - bound consolidation stage of 732 - 872 [31]. - Trend Logic: Last week, global shipment volume was 34.73 million tons, arrivals at 45 major Chinese ports were 22.17 million tons, steel enterprises' inventory was 89.93 million tons, and major domestic ports' inventory was 150.52 million tons [31]. - Strategy Suggestion: Consider implementing a grid trading strategy during the consolidation stage [31]. 2.2 Variety Trading Strategy - Last Week's Strategy Review: The mid - term price of iron ore was in an oscillatory consolidation stage [34]. - This Week's Strategy Suggestion: Implement a grid trading strategy with an antenna of 872, a ground line of 732, a grid spacing of 10, and 14 grids [35]. 2.3 Relevant Data - Data Sources: Wind, Mysteel, and the Trading Consultation Department of Great Wall Futures [41]

Report Summary 1. Report Industry Investment Rating No investment rating is provided in the report. 2. Core Viewpoints - The aluminum price is expected to show a moderately strong and volatile performance in the coming week, driven by factors such as the increasing expectation of the Fed's interest - rate cut in early December, the setback in the Russia - Ukraine cease - fire agreement, concerns about the high concentration of overseas copper resources, and the low historical level of the aluminum - copper ratio [5][12]. - In the medium - term, the aluminum price is expected to be in a moderately strong and volatile trend, and the strategy is to hold long positions and wait for price increases [5]. - By the end of the year, the rigid constraints on the supply side prevent a significant decline in the aluminum price, but the demand side enters the off - season and the differentiation intensifies, which restricts the rise of the aluminum price. It is expected that the aluminum price will continue to fluctuate within a range in the short term [12]. 3. Summary by Relevant Catalogs 3.1 Medium - term Market Analysis - **Trend Judgment**: Moderately strong and volatile. The expectation of the Fed's interest - rate cut in early December, the setback in the Russia - Ukraine cease - fire agreement, concerns about the high concentration of overseas copper resources, and the low historical level of the aluminum - copper ratio have pushed the aluminum price to stop falling and rebound [5]. - **Strategy Suggestion**: Hold long positions and wait for price increases [5]. 3.2 Variety Trading Strategy - **Last Week's Strategy Review**: The main 2601 contract was expected to be in the range of 21,000 - 21,700 in the coming week [8]. - **This Week's Strategy Suggestion**: It is advisable to hold long positions with a light position due to increased volatility, and spot enterprises are suggested to appropriately increase inventory [9]. 3.3 Overall Viewpoint - **Supply Side** - **Bauxite Market**: The cumulative import volume growth rate of bauxite this year is higher than the cumulative production growth rate of alumina. The bauxite market is in a state of oversupply, and the subsequent overall supply is expected to increase steadily [10]. - **Alumina Market**: As of November 28, the domestic alumina production capacity is about 112.55 million tons, the operating capacity is about 97.4 million tons, and the capacity utilization rate is about 86.06%. In 2026, the new alumina production capacity is about 14.4 million tons/year, mainly concentrated in the first half of next year. The supply - demand contradiction of alumina is still severe [10]. - **Electrolytic Aluminum Production**: In October, the domestic built - in production capacity of electrolytic aluminum was about 45.7165 million tons, the operating capacity was about 44.5593 million tons, and the aluminum water ratio was about 74%. The global aluminum supply has entered a stage of low growth [10]. - **Import and Export**: The theoretical loss of electrolytic aluminum imports is about 1,900 yuan/ton. In October, the export volume of unwrought aluminum and aluminum products was about 503,000 tons, which is at the average level in recent years [10]. - **Demand Side** - **Aluminum Profiles**: The domestic aluminum profile industry's operating rate increased by 0.4 percentage points to 52.5% this week. The construction profile market is sluggish, the growth of automobile profiles is difficult to find, and the export orders of photovoltaic profiles are good [11]. - **Aluminum Sheets, Strips, and Foils**: The operating rate of leading aluminum sheet and strip enterprises remained stable at 66.4%. It is expected to continue to decline in December. The operating rate of leading aluminum foil enterprises remained stable at 70.4% and is expected to remain stable in December [11]. - **Aluminum Cables**: The weekly operating rate of aluminum cables increased by 0.6 percentage points to 63% this week, and it is expected that the enterprise's on - hand orders will increase in December [11]. - **Alloys**: The operating rate of primary aluminum alloy increased by 0.4 percentage points to 60.2% this week, and the operating rate of the recycled aluminum industry increased by 0.9 percentage points to 61.5%. However, the subsequent improvement space is limited [11]. - **Inventory** - **Electrolytic Aluminum**: The social inventory of electrolytic aluminum ingots is 595,000 tons, a decrease of about 4% from last week and an increase of about 7% from the same period last year. The in - plant inventory is at a low level in recent years, and the outbound volume has increased since mid - November. The aluminum rod inventory is 131,600 tons, a decrease of about 3% from last week and an increase of about 37% from the same period last year. The LME aluminum inventory decreased slightly by about 2% from last week and is about 23% lower than the same period last year [11]. - **Profit** - **Alumina**: The average full - cost of the domestic alumina industry in the recent month is about 2,800 yuan/ton, the theoretical spot profit is about 50 yuan/ton, and the theoretical profit of the futures main contract is - 100 yuan/ton [12]. - **Electrolytic Aluminum**: The average production cost of domestic electrolytic aluminum is about 16,950 yuan/ton, and the theoretical profit is about 4,400 yuan/ton [12]. 3.4 Important Industrial Link Price Changes - The import price of bauxite continued to be under pressure, the coal price declined slightly, the alumina price remained stable, and the prices of other industrial links also showed different degrees of change [13]. 3.5 Important Industrial Link Inventory Changes - The domestic port bauxite inventory increased slightly, the alumina inventory continued to accumulate, the domestic mainstream consumption area's electrolytic aluminum ingot inventory decreased, and the LME aluminum inventory decreased slightly [17][18]. 3.6 Supply - Demand Situation - The operating rate of downstream processed materials increased by 0.4 percentage points to 62.3% this week. The industry will continue to be stable in the short term, but the recovery space in some fields is limited [27]. 3.7 Futures - Spot Structure - The current Shanghai aluminum futures show a normal market structure with higher prices in the far - term and lower prices in the near - term, and the spot price has a premium over the near - month contract, showing a U - shaped structure [30]. 3.8 Spread Structure - The spread between aluminum ingots and ADC12 is about - 2,040 yuan/ton, and the current spread has a neutral impact on electrolytic aluminum [33][35]. 3.9 Market Capital Situation - **LME Aluminum**: The net long position of the LME aluminum variety is near the high level since April 2022. The latest net long position of the fund decreased slightly, and both the long and short camps reduced their positions. Overall, overseas funds are still dominated by the long side [37]. - **SHFE Electrolytic Aluminum**: The net long position of the main contract of SHFE electrolytic aluminum remained stable this week. Both the long and short sides continued to reduce their positions since mid - November. The net long position of financial speculation - based funds remained stable, and the funds of mid - and downstream enterprises were in a stalemate between long and short [40].

2025.12.01-12.05 豆粕、豆油 期货品种周报 01 P A R T 豆粕期货 Contents 01 中线行情分析 02 品种交易策略 03 相关数据情况 目录 中线行情分析 中线趋势来看，豆粕主力处于震荡的阶段。 中线趋势判断 1 趋势判断逻辑 据Mysteel数据：第47周油厂大豆实际压榨量233.44万吨，开机率为 64.22%，豆粕库存115.15万吨。油厂维持高开工率，加之大豆到港量充 裕，豆粕库存持续累积，供应整体宽松。同时，下游养殖利润处于亏损 状态，严重抑制饲料消费需求，企业多以刚需补库为主。尽管基本面偏 弱，但进口成本为价格提供底部支撑，加之南美天气仍存不确定性。综 合来看，中线趋势预计豆粕价格将处于震荡阶段。 2 关注美豆出口节奏，南美天气，养殖需求。 中线策略建议 3 品种交易策略 上周策略回顾 豆粕期价整体趋势处于下行通道,资金方面较为偏空。M2601 短期内预计处于震荡偏弱阶段，预计运行区间：2920-3080。 本周策略建议 豆粕期价整体趋势处于横盘阶段,资金方面倾向不明显。M2601 短期内预计处于震荡阶段，预计运行区间：2980-3100。 品种诊断情况 | 豆粕 ...

Report Summary 1. Report Industry Investment Rating No investment rating information is provided in the report. 2. Core Views - Gold futures are in an upward trend, possibly at the end of the trend. Last week, the price showed a volatile and upward trend with a cumulative increase of 2.54%. In the short - term, it may maintain high - level volatility, and in the long - term, it is supported by central bank gold purchases and the easing cycle [7]. - Silver futures are in a strong upward phase, also possibly at the end of the trend. Last week, the price showed a volatile and strengthening trend. In the short - term, it may maintain high - level volatility, and in the long - term, it is supported by supply - demand balance and the easing cycle [31]. 3. Summary by Directory Gold Futures - **Mid - term Market Analysis** - **Trend Judgment**: The overall trend of Shanghai Gold futures is in an upward channel, possibly at the end of the trend [7]. - **Trend Logic**: Last week, the gold price was volatile and upward, with a 2.54% increase. It was driven by the strengthened expectation of the Fed's December interest rate cut, a weaker US dollar index, and continuous capital inflow. However, the upward momentum was restricted as the market had partially priced in the easing expectation before the December FOMC meeting. In the future, it may maintain high - level volatility in the short - term and be supported by central bank gold purchases and the easing cycle in the long - term [7]. - **Mid - term Strategy**: It is recommended to wait and see [8]. - **Variety Trading Strategy** - **Last Week's Strategy Review**: The Shanghai Gold contract 2602 was in short - term volatility. The upper pressure level was 960 - 970 yuan/gram, and the lower support level was 910 - 920 yuan/gram. It was recommended to wait and see [10]. - **This Week's Strategy Suggestion**: The Shanghai Gold contract 2602 may continue high - level volatility in the short - term. The upper pressure level is 960 - 970 yuan/gram, and the lower support level is 930 - 940 yuan/gram. It is recommended to wait and see [11]. - **Related Data Situation**: The report provides data on the price trends of Shanghai Gold and COMEX gold, SPDR gold ETF holdings, COMEX gold inventory, US 10 - year Treasury yield, US dollar index, US dollar against offshore RMB, gold - silver ratio, Shanghai Gold basis, and gold internal - external price difference [18][21][23][25][27]. Silver Futures - **Mid - term Market Analysis** - **Trend Judgment**: The overall trend of Shanghai Silver futures is in a strong upward phase, possibly at the end of the trend [31]. - **Trend Logic**: Last week, the silver price was volatile and strengthening. It was driven by the strengthened expectation of the Fed's December interest rate cut, continuous depletion of global silver inventory, recovery of industrial demand, and large - scale capital inflow. In the future, it may maintain high - level volatility in the short - term and be supported by supply - demand balance and the easing cycle in the long - term [31]. - **Mid - term Strategy**: It is recommended to wait and see [32]. - **Variety Trading Strategy** - **Last Week's Strategy Review**: The silver contract 2602 was in short - term consolidation. The upper pressure level was 12,000 - 12,200 yuan/kg, and the lower support level was 11,600 - 11,800 yuan/kg. It was recommended to wait and see [35]. - **This Week's Strategy Suggestion**: The silver contract 2602 may strengthen in short - term volatility. The upper pressure level is 12,500 - 13,000 yuan/kg, and the lower support level is 11,500 - 12,000 yuan/kg. It is recommended to buy on dips [36]. - **Related Data Situation**: The report provides data on the price trends of Shanghai Silver and COMEX silver, SLV silver ETF holdings, COMEX silver inventory, Shanghai Silver basis, and silver internal - external price difference [43][45][47].

工业硅期货 目录 01 中线行情分析 02 品种交易策略 03 相关数据情况 Contents 工业硅、碳酸锂 期货品种周报 01 P A R T 2025.11.24-11.28 中线行情分析 工业硅期货目前处于大区间运行。 中线趋势判断 1 趋势判断逻辑 2 上周工业硅现货价格维稳，截至11月21日新疆地区421#价格9200元/吨， 云南地区421#价格9900元/吨，四川地区421#价格10000元/吨。长城期货 AI智能投询品种诊断报告显示工业硅价格日线处在横盘阶段。资金方面， 主力显示出较强的偏多情绪。 预计工业硅2601合约运行区间在7500—10000之中。 中线策略建议 3 品种交易策略 上周策略回顾 工业硅大区间运行，观望为主。 本周策略建议 工业硅大区间运行，观望为主。 相关数据情况 截止至2024年04月19日，上海期货交易所阴极铜库存为300,045吨，较上一周增加322吨。从季节性角度分析，当前库存较近五年相比维持在较高水平。 SHF阴极铜库存走势 SHF阴极铜库存季节性分析 本报告数据来源为Wind、Mysteel、长城期货交易咨询部 相关数据情况 截止至2024年04月19日， ...

Contents 01 P A R T 豆粕期货 2025.11.24-11.28 豆粕、豆油 期货品种周报 目录 01 中线行情分析 02 品种交易策略 03 相关数据情况 中线趋势来看，豆粕主力处于宽幅震荡的阶段。 中线趋势判断 1 趋势判断逻辑 据Mysteel数据：第46周油厂大豆实际压榨量207.76万吨，开机率为 57.15%，豆粕库存99.29万吨。供应端，油厂高开工率与近百万吨库存令 市场承压，加之进口大豆到港及南美丰产预期，供应整体宽松。需求端， 养殖利润亏损抑制饲料消费，下游企业补库谨慎。然而，进口成本及油 厂持续亏损挺价意愿为价格提供支撑。中线趋势预计豆粕价格将处于宽 幅震荡阶段。 2 关注中美贸易政策变化，南美天气，养殖需求。 中线策略建议 3 中线行情分析 品种交易策略 上周策略回顾 豆粕期价整体趋势处于上行通道,资金方面较为偏空。M2601 短期内预计震荡调整后重心仍缓慢上移，预计运行区间： 3000-3180。 本周策略建议 豆粕期价整体趋势处于下行通道,资金方面较为偏空。M2601短 期内预计处于震荡偏弱阶段，预计运行区间：2920-3080。 品种诊断情况 精选指标情况 本报 ...

Group 1: Overall Information - Report title: "Rebar, Iron Ore Futures Weekly Report" [2] - Report period: November 24 - 28, 2025 [1] Group 2: Rebar Futures 1. Mid - term Market Analysis - Mid - term trend: The main contract of rebar futures is in a sideways consolidation range of 2882 - 3330 [7] - Trend judgment logic: Weekly rebar output is 2.08 million tons, apparent consumption is 2.3 million tons, major steel mills' inventory is 1.53 million tons, and social inventory is 5.97 million tons [7] - Mid - term strategy: Consider a grid trading strategy with an antenna of 3330, a ground line of 2882, a grid spacing of 32, and 14 grids [7] 2. Variety Trading Strategy - Last week's strategy review: The main contract of rebar futures entered an oscillatory consolidation range [10] - This week's strategy: Implement a large - grid trading strategy as the main contract is in a sideways consolidation range [11] - Hedging advice for spot enterprises: Wait and see until a new mid - term trend becomes clear [12] 3. Related Data - Data sources: Wind, Mysteel, and the trading consulting department of Great Wall Futures [15][20][21] Group 3: Iron Ore Futures 1. Mid - term Market Analysis - Mid - term trend: The main contract of iron ore futures is in a range - bound consolidation stage of 732 - 872 [31] - Trend judgment logic: Last week, the global shipment volume of iron ore was 3.516 million tons, the arrival volume at 45 major Chinese ports was 2.268 million tons, steel enterprises' inventory was 9.001 million tons, and the inventory at major domestic ports was 15.054 million tons [31] - Mid - term strategy: Consider implementing a grid trading strategy [31] 2. Variety Trading Strategy - Last week's strategy review: The mid - term price of iron ore was in an oscillatory consolidation stage [34] - This week's strategy: Implement a grid trading strategy with an antenna of 872, a ground line of 732, a grid spacing of 10, and 14 grids [35] 3. Related Data - Data sources: Wind, Mysteel, and the trading consulting department of Great Wall Futures [41][48][52]

1. Report Industry Investment Rating No information provided in the content. 2. Core Views of the Report - The soda ash futures market is in a volatile stage. The core contradiction of high supply and weak demand remains unresolved, and the price center has shifted downwards. It is recommended to wait and see [6][8]. - The float glass market is in a weak and volatile trend. The supply - demand contradiction is prominent, and the short - term weak situation is difficult to change. It is recommended to hold an empty position and wait and see [31]. 3. Summary by Directory Soda Ash Futures 3.1 Mid - term Market Analysis - The soda ash futures are in a volatile stage. The domestic soda ash market was generally stable last week. The supply contracted due to some device overhauls, but it was still abundant. The demand was divided, with light soda demand relatively stable and heavy soda demand continuously weak. Coal cost increase and industry losses provided support for prices. The market was in a game between weak reality and strong cost, and it was expected to maintain a narrow - range shock in the short term. The soda ash futures price oscillated downward, and the main contract fell below the key point. It is recommended to wait and see [6][8]. 3.2 Variety Trading Strategy - **Last Week's Strategy Review**: The domestic soda ash market was stable with a slight upward trend last week. Light soda prices rose slightly, and heavy soda prices remained stable. Supply contracted but demand was stable, with obvious cost support. It was expected to continue narrow - range consolidation under the oversupply pattern. The futures were in a tug - of - war, and it was expected that the operating range of soda ash 2601 was 1100 - 1250 [11]. - **This Week's Strategy Suggestion**: The domestic soda ash market remained stable last week. Light soda demand was stable, and heavy soda demand was weak. Supply decreased slightly due to overhauls but was still abundant. Cost support and enterprises' willingness to stabilize prices were obvious. The market was in a game between weak reality and strong cost, and it was expected to continue to oscillate in the short term. The expected operating range of soda ash 2601 was 1100 - 1250 [12]. 3.3 Relevant Data Situation - The relevant data include China's weekly soda ash开工率, production, light - soda inventory, heavy - soda inventory, basis, and ammonia - soda process production cost in North China [13][17][19]. Float Glass Futures 3.1 Mid - term Market Analysis - The float glass market was in a weak and volatile trend. The domestic float glass market declined weakly last week, with prices in various regions generally falling by 20 - 50 yuan/ton. The supply was generally abundant, and downstream demand was continuously weak. Enterprises' shipment pressure increased, and most adopted price - cut promotions, but the transactions were mainly low - priced resources. The overall inventory was still in an accumulating trend. The supply - demand contradiction in the futures market was prominent, and the short - term weak situation was difficult to change. It is recommended to hold an empty position and wait and see, and pay attention to inventory destocking and policy trends in the follow - up [31]. 3.2 Variety Trading Strategy - **Last Week's Strategy Review**: The domestic float glass market was weak last week, with prices stable with a slight decline. Supply was sufficient but downstream orders were limited. Manufacturers mainly focused on reducing inventory and shipping. Cost provided support but the market lacked positive factors. The futures market was in a weak and volatile trend [34]. - **This Week's Strategy Suggestion**: The float glass market was weak last week, with spot prices generally falling. Supply was abundant while demand was weak. Enterprises carried out price - cut promotions, and the overall inventory pressure remained. The futures market declined unilaterally, and the supply - demand contradiction was prominent. It was expected to maintain a weak and volatile trend [35]. 3.3 Relevant Data Situation - The relevant data include China's weekly float glass production,开工率, production cost and production profit of the float process using natural gas as fuel, basis, and ending inventory [37][40][44].