Market Overview - The Shanghai Composite Index rose by 0.34% on November 28, with 29 out of 31 sectors experiencing gains, led by the steel and agriculture sectors, both up by 1.59% [1] - The telecommunications sector saw a modest increase of 0.12%, while the banking and coal sectors faced declines of 0.83% and 0.14%, respectively [1] Capital Flow Analysis - The net inflow of capital in the two markets reached 10.84 billion yuan, with 19 sectors experiencing net inflows [1] - The electronics sector led the net inflow with 3.423 billion yuan and a daily increase of 1.30%, followed by the non-ferrous metals sector, which saw a net inflow of 3.051 billion yuan and a daily increase of 1.44% [1] Telecommunications Sector Performance - In the telecommunications sector, there were 124 stocks, with 86 rising and 36 falling; 2 stocks hit the daily limit up [2] - The top net inflow stocks included Xinyi Technology with 627 million yuan, Tianfu Communication with 433 million yuan, and Changxin Bochuang with 355 million yuan [2] - The sector experienced a net outflow of 1.311 billion yuan, with the largest outflows from Zhongji Xuchuang (799 million yuan), ZTE Corporation (695 million yuan), and Yongding Co. (276 million yuan) [2][4] Top Gainers in Telecommunications - Notable gainers in the telecommunications sector included: - Xinyi Technology: +2.05%, turnover rate 4.68%, net inflow 626.81 million yuan - Tianfu Communication: +1.88%, turnover rate 4.71%, net inflow 432.73 million yuan - Changxin Bochuang: +7.22%, turnover rate 18.54%, net inflow 354.54 million yuan [2] Top Losers in Telecommunications - Major losers in the telecommunications sector included: - Zhongji Xuchuang: -1.81%, turnover rate 2.94%, net outflow 796.74 million yuan - ZTE Corporation: -0.50%, turnover rate 3.48%, net outflow 695.40 million yuan - Yongding Co.: -1.26%, turnover rate 12.93%, net outflow 275.75 million yuan [4]

Core Insights - The Terahertz concept sector increased by 2.69%, ranking fourth among concept sectors, with 18 stocks rising, including LeiKe Defense which hit the daily limit, and YaGuang Technology, TianYin Electromechanical, and HaiTe High-tech showing significant gains of 13.48%, 6.03%, and 3.91% respectively [1][2] Market Performance - The top-performing concept sectors today included Titanium Dioxide with a rise of 4.31%, Hainan Free Trade Zone at 3.54%, and Dairy Industry at 2.82%, while the Terahertz sector followed closely at 2.69% [2] - The Terahertz sector experienced a net outflow of 359 million yuan, with 11 stocks receiving net inflows from major funds, and 6 stocks seeing inflows exceeding 30 million yuan [2] Fund Flow Analysis - LeiKe Defense led the net inflow with 406 million yuan, followed by YaGuang Technology, ChangFei Fiber, and HaiGe Communication with net inflows of 237 million yuan, 88.86 million yuan, and 54.67 million yuan respectively [2][3] - The net inflow ratios for LeiKe Defense, YaGuang Technology, and HaiGe Communication were 20.05%, 11.53%, and 10.21% respectively, indicating strong investor interest [3] Stock Performance - LeiKe Defense showed a daily increase of 10.06% with a turnover rate of 21.41%, while YaGuang Technology rose by 13.48% with a turnover rate of 28.12% [3][4] - Other notable performers included TianYin Electromechanical and HaiTe High-tech, which increased by 6.03% and 3.91% respectively [1][4]

2025.11. 28 本文字数：745，阅读时长大约2分钟 作者 | 一财阿驴 11月28日，A股三大指数低开高走，截至收盘，沪指涨0.34%，深成指涨0.85%，创业板指涨0.7%。沪指本月累计跌 1.67%，深成指本月累跌2.95%，创业板指累跌4.23%。 | 代码 | 名称 | 两日图 | 现价 | 涨跌 | 涨跌幅 | | --- | --- | --- | --- | --- | --- | | 000001 | 上证指数 | Min | 3888.60 | 13.34 | 0.34% | | 399001 | 深证成指 | mm | 12984.08 | 108.89 | 0.85% | | 399006 | 创业板指 | ma | 3052.59 | 21.29 | 0.70% | 盘面上，福建板块午后涨势扩大，锂电池产业链全线反弹，商业航天概念午后回升；银行、医药股逆势飘绿。 具体来看，商业航天概念集体爆发，航天发展、四川金顶、乾照光电、航天环宇等10股涨停。 | 代码 | 名称 | 涨幅量 | 现价 | | --- | --- | --- | --- | | 300102 | 乾照光电 ...

Market Overview - On November 27, the Shanghai Composite Index closed at 3875.26 points, up 0.29%, with a trading volume of 698.5 billion yuan. The Shenzhen Component Index closed at 12875.19 points, down 0.25%, with a trading volume of 1011.275 billion yuan. The ChiNext Index closed at 3031.30 points, down 0.44%, with a trading volume of 499.106 billion yuan. The total trading volume of both markets was 1709.775 billion yuan, a decrease of 73.552 billion yuan compared to the previous trading day [1]. Sector Performance - The chemical, light manufacturing, petroleum and petrochemical, coal, beauty care, and public utilities sectors showed the highest gains. Concepts such as organic silicon, solid-state batteries, and AI mobile phones were particularly active. In contrast, sectors like media, retail, computer, real estate, and transportation experienced declines [2]. Stock Performance - A total of 2732 stocks rose while 2227 stocks fell, with 195 stocks remaining flat and 15 stocks suspended. Excluding newly listed stocks, there were 63 stocks that hit the daily limit up, while 14 stocks hit the limit down [2]. Fund Flow - The net outflow of main funds in the Shanghai and Shenzhen markets was 18.622 billion yuan, with the ChiNext experiencing a net outflow of 9.423 billion yuan. The most significant net inflow was seen in the light manufacturing sector, amounting to 471 million yuan [4]. Individual Stock Highlights - Among individual stocks, ZTE Corporation (000063) had the highest net inflow of main funds at 915 million yuan, followed by Annie Co., Ltd. (002235) with 398 million yuan and Shannon Technology with 384 million yuan [8][9]. - Conversely, Zhongji Xuchuang (300308) experienced the largest net outflow of 1.479 billion yuan, followed by Huadian Electric (002463) with 954 million yuan and CATL (300750) with 806 million yuan [11][12]. Institutional Activity - Institutions had a net buy of 9 stocks, with Haike New Source being the most purchased stock at approximately 133 million yuan. The most sold stock was Shanghai Film, with a net sell of about 86.869 million yuan [14][15].

Core Insights - The article presents a new research study that challenges the traditional belief that supervised fine-tuning (SFT) is a necessary precursor to reinforcement learning (RL) in the training of multimodal models, demonstrating that RL alone can effectively optimize multimodal capabilities [2][36]. Group 1: Research Findings - The study, conducted by Central South University and ZTE Corporation, introduces a quantifiable and operational "difficulty sampling" standard for multimodal models, validating the effectiveness of a training approach that relies solely on RL strategies (GRPO) [3][36]. - The research addresses two long-standing issues in multimodal post-training: the lack of quantifiable sample difficulty metrics and the inability of training paradigms to optimize perception and reasoning capabilities simultaneously [4][5][6]. Group 2: Methodology - Two complementary difficulty quantification strategies are proposed: Progressive Image Semantic Masking (PISM) and Cross-Modality Attention Balance (CMAB), which facilitate the hierarchical training framework [7][36]. - PISM involves progressively masking different parts of images to simulate varying degrees of visual information loss, allowing for the assessment of model performance based on its reliance on visual details [10][14]. - CMAB evaluates the complexity of cross-modal interactions by analyzing the attention scores of generated tokens across different Transformer layers, providing insights into the balance of attention between text and image inputs [19][34]. Group 3: Experimental Results - The experimental results indicate that the GRPO-only paradigm, which utilizes medium and difficult samples, significantly outperforms both full dataset training and random sample training, underscoring the importance of data quality over quantity [29][36]. - In visual reasoning tasks, the GRPO-only approach achieved optimal scores in multiple metrics, with notable improvements in MathVista (68.3) and OCRBench (77.8) compared to traditional methods [27][29]. - The study also highlights that SFT did not contribute to performance gains, suggesting that it may introduce "pseudo chains of thought" that limit the model's true reasoning capabilities [29][36]. Group 4: Future Directions - The research team outlines three future research directions: dynamic difficulty adjustment for adaptive learning, exploration of combined sampling strategies from PISM and CMAB, and validation of methods on larger multimodal models [38][39].

Core Points - Huawei and ZTE have signed 5G agreements in Vietnam, indicating a warming relationship between Vietnam and China amid deteriorating ties with the U.S. due to tariffs [1][2] - Vietnam has historically been cautious about using Chinese technology in sensitive infrastructure, but recent developments suggest a shift in this stance [1][4] - Contracts awarded to Huawei and ZTE include a $23 million deal for 5G equipment and additional contracts exceeding $20 million for 5G antennas [1][5] Group 1: Contracts and Agreements - Huawei and ZTE have secured multiple contracts for supplying 5G equipment in Vietnam, with Huawei winning a $23 million contract in April and ZTE winning contracts totaling over $20 million recently [1][5] - Despite concerns from Western officials, the contracts reflect Vietnam's changing approach towards Chinese technology amid geopolitical tensions [1][2] Group 2: Geopolitical Context - The U.S. has pressured Vietnam to avoid Chinese contractors in its digital infrastructure projects, including undersea cables, citing national security risks [4][6] - Recent meetings among Western officials in Vietnam have raised concerns about the implications of using Chinese technology on trust in Vietnam's networks and access to advanced U.S. technology [6][7] Group 3: Industry Dynamics - Huawei and ZTE face restrictions in the U.S. and some European countries due to perceived national security risks, yet they continue to expand their presence in Vietnam [5][9] - The European Commission is exploring measures to compel member states to exclude high-risk suppliers like Huawei and ZTE from telecom networks, which could lead to political disputes [7][9]

Market Dynamics - Huawei and ZTE have won contracts to supply 5G equipment to Vietnam, despite US government's efforts to exclude Chinese contractors from digital infrastructure projects [1] - The US government has been urging Vietnam to exclude Chinese contractors, including those involved in submarine cable projects, as a condition for advanced technology support [1] Contract Details - A consortium including Huawei secured a $23 million (23 million 美元) contract for 5G equipment [1] - ZTE won at least two contracts, including one worth over $20 million (20 million 美元) last week, for producing 5G antennas [1] Geopolitical Context - The US announced tariffs on Vietnamese goods in April [1]

Core Insights - As of November 27, the total market financing balance reached 2.46 trillion yuan, marking an increase of 2.75 billion yuan from the previous trading day, with a continuous rise over three consecutive trading days [1] - The financing balance in the Shanghai market was 1.24 trillion yuan, up by 493 million yuan, while the Shenzhen market saw a balance of 1.20 trillion yuan, increasing by 2.25 billion yuan [1] - A total of 1,781 stocks experienced net financing inflows, with 379 stocks having net inflows exceeding 10 million yuan, and 24 stocks surpassing 100 million yuan in net inflows [1] Individual Stock Highlights - The top stock for net financing inflow on November 27 was Shenghong Technology, with a net inflow of 501 million yuan, followed by Cambrian Technologies and ZTE Corporation with net inflows of 370 million yuan and 286 million yuan, respectively [2] - In terms of industry concentration, the electronics, communications, and power equipment sectors had the highest number of stocks with net inflows exceeding 100 million yuan, with 9, 4, and 3 stocks respectively [1] Financing Balance Analysis - The average ratio of financing balance to circulating market value for stocks with significant net inflows was 5.17%, with the highest ratio observed in Yintang Zhikong at 11.03% [2] - Other stocks with high financing balance ratios included Cambridge Technology, Yunnan Zhiye, and Huagong Technology, with ratios of 10.19%, 8.88%, and 7.68% respectively [2] Sector Performance - The main board had 9 stocks with significant net inflows, while the ChiNext board had 11, and the Sci-Tech Innovation board had 4 [1] - The performance of individual stocks varied, with some experiencing notable price changes alongside their financing activities, such as Yintang Zhikong with a 10.79% increase and Shenghong Technology with a slight increase of 0.06% [3]

Core Points - Huawei and ZTE have secured multiple 5G equipment supply contracts in Vietnam this year, indicating a strengthening relationship between China and Vietnam [1] - The U.S. has imposed tariffs on Vietnamese goods, leading to a cooling of relations, while Vietnam has increasingly adopted technology from Chinese companies [1] - Although Ericsson and Nokia have obtained contracts for Vietnam's 5G core infrastructure, Chinese companies are winning smaller projects in public procurement [1] - A consortium including Huawei won a $23 million 5G equipment contract shortly after the U.S. announced tariffs on Vietnamese goods [1] - ZTE has also secured at least two contracts, with one recently finalized, totaling over $20 million for 5G antenna orders [1] - The timing of these contracts has raised concerns among Western officials regarding their potential impact on trust in Vietnam's networks and access to U.S. advanced technology [2] Company and Industry Summary - Chinese companies, particularly Huawei and ZTE, are expanding their presence in Vietnam's telecommunications sector amid geopolitical tensions [1][2] - The contracts won by Chinese firms have become a topic of discussion among Western officials, highlighting concerns over technology trust and influence in Vietnam [2] - Major Western competitors like Ericsson and Nokia are still active in the market, but the growing success of Chinese firms indicates a shift in Vietnam's technology partnerships [1][2]

Group 1 - A total of 3735 stocks in the A-share market received financing purchases on November 27, with 325 stocks having purchase amounts exceeding 100 million yuan [1] - The top three stocks by financing purchase amount were Zhongji Xuchuang, Xinyi Sheng, and Shenghong Technology, with amounts of 4.428 billion yuan, 3.497 billion yuan, and 2.077 billion yuan respectively [1] - Four stocks had financing purchase amounts accounting for over 30% of the total transaction amount, with Jicheng Electronics, Tongling Shares, and Wuchan Zhongda leading at 35.54%, 31.53%, and 30.87% respectively [1] Group 2 - There were 24 stocks with net financing purchases exceeding 100 million yuan, with Shenghong Technology, Hanwujishi-U, and ZTE ranking the highest at 501 million yuan, 370 million yuan, and 286 million yuan respectively [1]