Latest update on major events announcements of Shanghai and Shenzhen listed companies on the evening of March 3

Shanghai and Shenzhen listed companies released company announcements on the evening of March 3. Here is a summary of important notices.

【Major Events】

Sinopec: Due to geopolitical and other factors, there are many uncertainties in international crude oil price trends

Sinopec (600028) announced on March 3 that its A-shares’ closing prices for three consecutive trading days—February 27, March 2, and March 3—deviated by more than 20% cumulatively, with significant volatility. Due to geopolitical and other factors, international crude oil prices are subject to many uncertainties. Investors should be aware of the risks.

CNOOC Engineering: International oil and gas engineering market faces certain uncertainties due to multiple factors including geopolitics

CNOOC Engineering (600339) announced on March 3 that its A-shares’ closing prices for February 27, March 2, and March 3 deviated by more than 20% cumulatively, indicating abnormal stock trading fluctuations. Recently, the company’s stock has experienced large price swings, and the international oil and gas engineering market faces uncertainties due to geopolitical and other factors. Investors should be cautious of risks.

Vanguard Precision Science: Plans to issue convertible bonds to raise no more than 750 million yuan

Vanguard Precision Science (688605) announced on March 3 that it plans to issue convertible bonds to raise up to 750 million yuan (including). After deducting issuance costs, all funds will be used for expanding core metal device processes in semiconductor advanced manufacturing; R&D and production of non-metallic materials and devices for semiconductor processes; development of ceramic static electricity chucks for semiconductor equipment; and supplementing working capital.

China National Offshore Oil: Two consecutive days of trading with large short-term oil price volatility

China National Offshore Oil (600938) announced on March 3 that recent international crude oil markets have experienced wide fluctuations influenced by geopolitical tensions, supply-demand patterns, and other factors. Short-term oil price volatility is high, and investors should be cautious of risks.

Donghua Energy: Wholly owned subsidiary Maoming Carbon Fiber plans to increase capital and introduce composite material fund

Donghua Energy (002221) announced on March 3 that its wholly owned subsidiary, Donghua Energy (Maoming) Carbon Fiber Co., Ltd. (“Maoming Carbon Fiber”), plans to introduce Maoming City Composite Material Equity Investment Fund Partnership (Limited Partnership) (“Composite Fund”) with a cash injection of 300 million yuan. The funds will mainly be used for the construction and operation of the “Donghua Energy 10,000-ton Carbon Fiber Project.” After the capital increase, the company will hold 66.67% of Maoming Carbon Fiber and remain its controlling shareholder, maintaining actual control.

*ST Xin Chao: Currently operating normally with no major changes

*ST Xin Chao (600777) announced on March 3 that its main business involves exploration, development, and sales of oil and natural gas. The company’s daily operations are normal with no significant changes, and the external environment remains stable.

CNOOC Development: Current production and operations are normal; no major industry policy adjustments

CNOOC Development (600968) announced on March 3 that its production and operations are normal, the market environment and industry policies have not undergone major changes, and internal management is orderly. No other major events that could significantly impact the stock price have been identified. The controlling shareholder has not bought or sold the company’s stock during the abnormal trading period. No other major events affecting the stock price have been found.

Shenghang Co.: International hazardous chemical waterway transportation business currently does not involve Middle East routes

Shenghang Co. stated on March 3 that its current international hazardous chemical water transportation mainly covers Northeast Asia, Southeast Asia, India, and other regions, and does not involve Middle East routes. Regional conflicts have no direct impact on operations, but fluctuations in international oil prices caused by conflicts will affect the company’s business. The company will continue to monitor market changes, focus on high-quality long-term and leasing contracts with international petrochemical clients, strengthen regional cooperation in Southeast Asia, Northeast Asia, and India, and adopt flexible pricing strategies, target high-potential markets, explore niche markets, and expand emerging growth areas to enhance resilience and profitability, ensuring stable operation of its dangerous goods waterway transportation business.

Zhongman Petroleum: Due to geopolitical conflicts and other factors, future oil price fluctuations are highly uncertain

Zhongman Petroleum (603619) announced on March 3 that its operations are normal, with no major changes in the market environment or industry policies. Recently, due to geopolitical conflicts and other factors, international crude oil prices have surged sharply in the short term. Future oil price fluctuations are highly uncertain, and investors should be cautious.

Haimer Technology: Future international crude oil price trends are uncertain

Haimer Technology (300084) announced on March 3 that it provides high-end equipment and digital technology services for oil and gas fields. Its industry is closely linked to international crude oil prices. Recently, tensions in the Middle East and disruptions in key shipping channels like the Strait of Hormuz have caused significant short-term increases in crude oil prices. The future trend of international crude oil prices remains uncertain due to geopolitical, macroeconomic, and supply-demand factors. If tensions in the Middle East persist or spread to other major oil and gas-producing countries, it could negatively impact the company’s future sales and service operations in the region.

CNOOC South China Oil: Multiple factors influence, international oil tanker freight rates fluctuate significantly

CNOOC South China Oil (601975) announced on March 3 that its recent operations are normal. Due to multiple factors, international oil tanker freight rates have experienced large fluctuations. Although the company’s stock price has risen sharply in the short term, its fundamentals have not changed significantly. Market sentiment may be overheated, and there is a risk of sharp declines. The company reminds investors that after such rapid increases, there could be significant drops.

Zhunyou Co.: Neither the company nor its subsidiaries have oil and gas production or overseas operations

Zhunyou Co. (002207) announced on March 3 that most of its revenue comes from domestic oilfield technology services. The company and its subsidiaries do not have oil and gas production or overseas operations. The main equipment used in its oil services runs on gasoline and diesel, so rising fuel prices could increase operating costs. The recent fluctuations in international crude oil and refined oil prices due to geopolitical tensions may impact future performance, but the extent remains uncertain.

Orient Securities: Approved to issue up to 6 billion yuan in tech innovation corporate bonds

Orient Securities (600958) announced on March 3 that it received approval from the China Securities Regulatory Commission to register a public issuance of tech innovation corporate bonds with a total face value of no more than 6 billion yuan.

GigaDevice: Plans to invest 400 million yuan in private equity funds

GigaDevice (603986) announced on March 3 that it plans to contribute 400 million yuan as a limited partner to subscribe for approximately 25.87% of the Shanghai Shixi GigaYi Zhixin Venture Capital Partnership (Limited Partnership). The fund will mainly invest in unlisted companies in the integrated circuit and related high-tech sectors, with at least 70% of the committed capital allocated to the semiconductor industry. Investment stages include early-stage, small and medium-sized, and high-tech enterprises.

【Performance Highlights】

Ningbo Port: Expected to achieve an 18.35% year-on-year increase in cargo throughput in February

Ningbo Port (601018) announced on March 3 that in February 2026, it is expected to handle 4.32 million TEUs of containers, up 28.42% year-on-year; and 95 million tons of cargo, up 18.35%.

Guangzhou Port: Expected to see a 3.6% decrease in cargo throughput in February

Guangzhou Port (601228) announced on March 3 that in February 2026, it expects to handle 1.8 million TEUs of containers, down 3.6%; and 41.43 million tons of cargo, down 3.6%. For January–February 2026, it expects to handle 4.329 million TEUs, up 7.7%, and 93.73 million tons, up 4.1%.

Changyuan Power: Power generation in February decreased by 9.78% year-on-year

Changyuan Power (000966) announced on March 3 that in February 2026, it generated 2.483 billion kWh, down 9.78% year-on-year. Specifically, thermal power decreased by 9.50%, hydropower increased by 23.68%, and new energy decreased by 18.55%. January–February 2026, total generation was 6.454 billion kWh, up 14.56%, with thermal power up 16.3%, hydropower up 76.27%, and new energy down 15.42%.

Zhuhai Guanyu: Estimated revenue for January–February increased by 45% to 54% year-on-year

Zhuhai Guanyu (688772) announced that preliminary estimates for January–February 2026 show revenue between 2.206 billion and 2.347 billion yuan, an increase of 45% to 54%. The growth is attributed to successful market expansion and increased customer share.

【Share Buybacks and Holdings】

Kweichow Moutai: Has repurchased a total of 572,500 shares, totaling 801 million yuan

Kweichow Moutai (600519) announced on March 3 that by February 2026, it had repurchased 155,700 shares, accounting for 0.0124% of total shares, at a maximum price of 1,499.74 yuan/share and a minimum of 1,456.12 yuan/share, totaling 230 million yuan. As of the end of February 2026, it had repurchased 572,500 shares, or 0.0457% of total shares, at a maximum of 1,499.74 yuan/share and a minimum of 1,322.60 yuan/share, totaling 801 million yuan (excluding transaction fees).

Tonghua Jinhua: Chairman plans to increase holdings by 10 million to 20 million yuan

Tonghua Jinhua (000766) announced that Chairman and General Manager Zhang Yufu plans to increase holdings through the Shenzhen Stock Exchange trading system, with a planned investment of no less than 10 million yuan and no more than 20 million yuan.

Happy Family: Actual controller Li Xing plans to inquire about and transfer 10.9368 million shares

Happy Family (300997) announced that one of its actual controllers and chairman, Li Xing, plans to inquire about and transfer 10.9368 million shares, representing 2.5% of the company’s total shares.