Core Viewpoint - The stock of Changguang Huaxin (688048.SH) experienced an abnormal trading fluctuation, with a cumulative price increase of 30% over three consecutive trading days from November 24 to November 26, 2025, attributed to rising computing power demand in the optical communication sector [1] Company Developments - The company has achieved mass production of its 100G EML products and has begun sample delivery for its 200G EML products [1] - The 100G VCSEL, 100mW CW DFB, and 70mW CWDM4 DFB chips have reached mass production and shipping levels [1] - The contribution of these products to the company's sales and profits for the current year remains uncertain [1] Market Conditions - There is a noted increase in demand for computing power, which is influencing the company's product development and market expansion efforts [1] - The company acknowledges the presence of uncertainties and risks associated with product research and development, sample testing, product introduction, and market expansion [1]

Core Viewpoint - The stock of Changguang Huaxin (688048.SH) experienced an abnormal trading fluctuation, with a cumulative price increase of 30% over three consecutive trading days from November 24 to November 26, 2025, attributed to rising demand for computing power in the optical communication sector [1] Company Summary - The company has achieved mass production of its 100G EML products and has begun sample delivery for its 200G EML products [1] - The 100G VCSEL, 100mW CW DFB, and 70mW CWDM4DFB chips have reached mass production and shipping levels [1] - The contribution of these products to the company's sales and profits for the current year remains uncertain [1] Industry Summary - The recent increase in computing power demand is a significant factor influencing the company's stock performance and product development [1] - There are inherent uncertainties and risks associated with product research and development, sample testing, product introduction, and market expansion [1]

Market Overview - On November 26, A-shares showed mixed performance with the three major indices fluctuating, and the total market turnover reached 1.8 trillion yuan, a decrease of 29 billion yuan compared to the previous trading day [1] - Market focus was on sectors such as pharmaceutical commerce and innovative drugs, while the shipbuilding sector declined and aerospace stocks fell [1] Stock Performance - A total of 68 stocks hit the daily limit up, with 21 stocks on consecutive limit up, and 23 stocks failed to hit the limit, resulting in a limit up rate of 75% (excluding ST and delisted stocks) [3] - Notable stocks included: - Shida Group (5 consecutive limit up) [4] - Xinhua Du (4 consecutive limit up) [4] - Special Information (4 consecutive limit up) [4] - Huanrui Century (4 consecutive limit up) [4] Key Stocks Analysis - **Shida Group**: Price at 6.15 yuan, up 10.02%, with a 5-day limit up due to acquisition plans [5] - **Huanrui Century**: Price at 9.75 yuan, up 10.05%, with a focus on AIGC and interactive content [5] - **Xinhua Du**: Price at 10.79 yuan, up 9.99%, involved in AI e-commerce and cross-border e-commerce [5] - **Special Information**: Price at 13.92 yuan, up 10.04%, linked to Shenzhen state-owned assets and optical communication [5] Trading Dynamics - The top three net buying stocks on the daily leaderboard were Dongxin Co., Yongding Co., and Zhongji Group, with net purchases of 373 million yuan, 260 million yuan, and 228 million yuan respectively [6] - The top three net selling stocks were Aerospace Development, Shanghai Port Bay, and Changcheng Military Industry, with net sales of 498 million yuan, 229 million yuan, and 219 million yuan respectively [7] Institutional Activity - Among stocks with institutional involvement, the top net buying stocks were Changguang Huaxin, Zhongji Group, and Zhonghuan Hailu, with net purchases of 232 million yuan, 187 million yuan, and 47 million yuan respectively [8] - The top net selling stocks with institutional involvement were Aerospace Development, Shanghai Port Bay, and Rongji Software, with net sales of 295 million yuan, 203 million yuan, and 101 million yuan respectively [9] Company Highlights - **Dongxin Co.**: Focused on niche storage chip design, with a revenue of 230 million yuan in Q3 2025, a year-on-year increase of 27.03% [10][11] - **Yongding Co.**: Reported a revenue of 3.63 billion yuan in the first three quarters, a year-on-year increase of 22.13%, with a net profit of 329 million yuan, up 474.30% [14] - **Zhongji Group**: Holds a backlog of orders worth approximately 5.55 billion USD in offshore engineering, with expected strong growth in revenue and profit [18] Trading Trends - **Changguang Huaxin**: Achieved a limit up with a turnover rate of 17.64% and a total transaction volume of 3.1 billion yuan [21] - **Zhongji Group**: Also reached a limit up with a turnover rate of 8.46% and a total transaction volume of 1.76 billion yuan [21] - **Aerospace Development**: Experienced a limit down with a turnover rate of 31.2% and a total transaction volume of 6.51 billion yuan [21]

Market Overview - On November 26, the Shanghai Composite Index fell by 0.15%, while the Shenzhen Component Index rose by 1.02%, and the ChiNext Index increased by 2.14% [1] - A total of 55 stocks appeared on the "Dragon and Tiger List" due to significant market movements, with the highest net inflow of funds into Dongxin Co., Ltd. (688110.SH) amounting to 373 million yuan [1][2] Stock Performance - Dongxin Co., Ltd. saw a net buying amount of 373 million yuan, accounting for 6.65% of the total trading volume, and closed up by 20% with a turnover rate of 11.72% [1] - The stock with the highest net outflow was Aerospace Development (000547.SZ), which experienced a net selling of 498 million yuan, representing 7.64% of the total trading volume, and closed down by 10% with a turnover rate of 31.2% [2][4] Institutional Activity - On the same day, institutions were involved in 30 stocks on the Dragon and Tiger List, with a total net selling of 323 million yuan, comprising 12 net buys and 18 net sells [4][5] - The stock with the highest net buying by institutions was Changguang Huaxin (688048.SH), which closed up by 20% and had a turnover rate of 17.64% [5] Northbound Capital Flow - Northbound capital participated in 24 stocks on the Dragon and Tiger List, with a total net buying of 234 million yuan; the Shanghai Stock Connect saw a net buying of 351 million yuan, while the Shenzhen Stock Connect had a net selling of 117 million yuan [8] - The highest net buying from northbound capital was also in Dongxin Co., Ltd., with a net inflow of 163 million yuan, while Aerospace Development had the highest net outflow of 111 million yuan [8] Summary of Key Stocks - The stocks that saw both institutional and northbound capital net buying included Changguang Huaxin, Zhongji Group, and Huaren Health, while the stocks with joint net selling included Shanghai Port Bay, Ocean Electric, and Aerospace Development [11][12] - Discrepancies were noted in Huaying Technology and Te Yi Pharmaceutical, where institutions sold Huaying Technology while northbound capital bought it, and vice versa for Te Yi Pharmaceutical [11]

Core Viewpoint - Changguang Huaxin (688048) announced a significant stock price fluctuation, with a cumulative increase of 30% over three consecutive trading days due to rising demand for computing power in the optical communication sector [1] Company Summary - The company has achieved mass production of its 100G EML products and has begun sample deliveries for its 200G EML [1] - The 100G VCSEL, 100mW CW DFB, and 70mW CWDM4DFB chips have reached mass production and shipping levels [1] - There is uncertainty regarding the contribution of these products to the company's sales and profits for the current year [1] Industry Summary - The optical communication industry is experiencing increased demand for computing power, which is driving the company's recent stock performance [1] - The company faces uncertainties and risks related to product development progress, sample testing, product introduction, and market expansion [1]

证券代码：688048 证券简称：长光华芯 公告编号： 2025-053 股票交易异常波动公告 本公司董事会及全体董事保证本公告内容不存在任何虚假记载、误导性陈述 或者重大遗漏，并对其内容的真实性、准确性和完整性承担个别及连带责任。 重要内容提示： 一、股票交易异常波动的具体情况 公司股票交易连续三个交易日内（2025 年 11 月 24 日、11 月 25 日、11 月 26 日）收盘价格涨幅偏离值累计达到 30%以上，根据《上海证券交易所交易规 则》《上海证券交易所科创板股票异常交易实时监控细则》的有关规定，属于股 苏州长光华芯光电技术股份有限公司（以下简称"公司"）股票于 2025 年 11 月 24 日、11 月 25 日、11 月 26 日连续 3 个交易日内日收盘价格涨幅偏离 值累计达到 30%。根据《上海证券交易所交易规则》《上海证券交易所科 创板股票交易特别规定》《上海证券交易所科创板股票异常交易实时监控 细则》的有关规定，属于股票交易异常波动。公司股价短期涨幅较大，敬 请投资者注意二级市场股票交易风险。 近期算力需求增长，在光通信领域中，公司的 100G EML 已实现量产，200G EML ...

Summary of Key Points Core Viewpoint - On November 26, a total of 37 stocks were identified with institutional activity, with 16 stocks showing net buying and 21 stocks showing net selling by institutions [1]. Institutional Buying - The top three stocks with the highest net buying by institutions were: - Changguang Huaxin with a net buying amount of 234 million yuan - China International Marine Containers (CIMC) with a net buying amount of 187 million yuan - Southern Power Digital with a net buying amount of 85.89 million yuan [1]. Institutional Selling - The top three stocks with the highest net selling by institutions were: - Aerospace Development with a net outflow of 295 million yuan - Shanghai Port Group with a net outflow of 203 million yuan - Rongji Software with a net outflow of 101 million yuan [1].

Core Viewpoint - The company, Changguang Huaxin (688048.SH), has reported a recent increase in computing power demand, particularly in the optical communication sector, with several products reaching mass production and testing stages [1] Product Development - The company has achieved mass production of its 100G EML and has begun sample delivery for its 200G EML [1] - The 100G VCSEL, 100mW CW DFB, and 70mW CWDM4 DFB chips have also reached mass production and shipping levels [1] Financial Impact - There is uncertainty regarding the contribution of these products to the company's sales and profits for the current year [1] Market and Risk Factors - The company acknowledges that there are uncertainties and risks associated with product development, sample testing, product introduction, and market expansion [1]

格隆汇11月26日｜长光华芯公告，公司股票于2025年11月24日、11月25日、11月26日连续3个交易日内 日收盘价格涨幅偏离值累计达到30%。公司股票交易连续三个交易日内收盘价格涨幅偏离值累计达到 30%以上，属于股票交易异常波动。 ...

长光华芯公告，公司股票于2025年11月24日、11月25日、11月26日连续3个交易日内日收盘价格涨幅偏 离值累计达到30%。公司股票交易连续三个交易日内收盘价格涨幅偏离值累计达到30%以上，属于股票 交易异常波动。 ...