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The turnover of Shanghai and Shenzhen stock markets exceeded 500 billion.The three major indexes all fell by more than 1%, with nearly 4,200 stocks, and the index weakened sharply. The Shanghai Composite Index fell by more than 1%, the Shenzhen Component Index fell by 1.24%, and the Growth Enterprise Market Index fell by 1.45%. Securities, real estate and photovoltaics were among the top losers, with nearly 4,200 stocks falling in Shanghai, Shenzhen and Beijing.Shanxi Securities: Sora officially launched the AI video generation tool, which continued to iterate. Shanxi Securities Research Report pointed out that 1) On December 10th, OpenAI officially launched Sora. Compared with the version released by OpenAI in February, the new Sora launched this time added Storyboard, Remix, Re-cut and other functions, which greatly improved the video re-creation ability and optimized the video generation speed and generation method. 2) Since the beginning of this year, domestic enterprises have begun to accelerate the research and development and iteration of AI video generation products, and the product capabilities have been continuously improved and the application scenarios have been continuously broadened. Sora was officially launched, and the video creation ability was significantly improved, and it began to change from a creative tool to a productivity tool. With the continuous iteration of AI video generation tools represented by Sora, its penetration into various application scenarios is expected to accelerate in the future. On the one hand, the application layer suggests focusing on creative, design, education and other multi-modal fields, especially video generation. On the other hand, the demand for computing power in video generation model is significantly higher than that in text, focusing on AI computing power related targets.

Chongda Technology: Five measures are taken to deal with the challenges and opportunities of industry development. Chongda Technology (002815) said in the online collective reception day of investors on December 12 that the company's measures to deal with the challenges and opportunities of industry development include: optimizing product structure, continuing to promote the optimization and upgrading of product structure, increasing R&D investment and market expansion in the field of high-end PCB boards, and accelerating the introduction of high-value customers and orders; Improve production efficiency and cost control; Accelerate the pace of capacity expansion, and promote the speed of capacity improvement of Dalian Plant, Zhuhai No.1 Plant and Zhuhai No.2 Plant in an orderly manner; According to market demand, adjust product price strategy in real time to improve profitability; Accelerate the construction of production base in Thailand, actively participate in international competition and cooperation, and enhance the company's visibility and influence in the global PCB market.Chongda Technology: Five measures are taken to deal with the challenges and opportunities of industry development. Chongda Technology (002815) said in the online collective reception day of investors on December 12 that the company's measures to deal with the challenges and opportunities of industry development include: optimizing product structure, continuing to promote the optimization and upgrading of product structure, increasing R&D investment and market expansion in the field of high-end PCB boards, and accelerating the introduction of high-value customers and orders; Improve production efficiency and cost control; Accelerate the pace of capacity expansion, and promote the speed of capacity improvement of Dalian Plant, Zhuhai No.1 Plant and Zhuhai No.2 Plant in an orderly manner; According to market demand, adjust product price strategy in real time to improve profitability; Accelerate the construction of production base in Thailand, actively participate in international competition and cooperation, and enhance the company's visibility and influence in the global PCB market.Chongda Technology: Five measures are taken to deal with the challenges and opportunities of industry development. Chongda Technology (002815) said in the online collective reception day of investors on December 12 that the company's measures to deal with the challenges and opportunities of industry development include: optimizing product structure, continuing to promote the optimization and upgrading of product structure, increasing R&D investment and market expansion in the field of high-end PCB boards, and accelerating the introduction of high-value customers and orders; Improve production efficiency and cost control; Accelerate the pace of capacity expansion, and promote the speed of capacity improvement of Dalian Plant, Zhuhai No.1 Plant and Zhuhai No.2 Plant in an orderly manner; According to market demand, adjust product price strategy in real time to improve profitability; Accelerate the construction of production base in Thailand, actively participate in international competition and cooperation, and enhance the company's visibility and influence in the global PCB market.

The weighted share price index of Taiwan Stock Exchange opened 0.2% lower at 23,002.37.The central parity of RMB against the US dollar was reported at 7.1876, down by 22 points; The median price of the previous trading day was 7.1854, the official closing price of the previous trading day was 7.2630, and it closed at 7.2700 last night.List of stock repurchases of Hong Kong stocks: 43 stocks were repurchased by the company. On December 12, a total of 43 Hong Kong stocks were repurchased by the company, and the repurchase amount of 8 stocks exceeded HK$ 10 million. Among them, Tencent Holdings, AIA and Samsonite have the largest repurchase amounts, with the company repurchasing HK$ 704 million, HK$ 61,711,300 and HK$ 34,247,500 respectively. As of December 12, 274 Hong Kong stocks have been repurchased by the company this year, and the cumulative repurchase amount of 62 stocks during the year exceeded HK$ 100 million. Among them, Tencent Holdings, HSBC Holdings and AIA have the largest cumulative repurchase amount during the year, with the company repurchasing HK$ 104.602 billion, HK$ 40.706 billion and HK$ 31.059 billion respectively.