According to the Chongda Technology announcement, the cumulative deviation value of the company's stock price increase exceeded 20% for three consecutive trading days on September 11, September 14, and September 15, 2026, which is an abnormal fluctuation in stock trading. Since August 2026, the company's stock price has accumulated a cumulative increase of 90.50%. It experienced abnormal fluctuations in September twice. As of September 15, the rolling price-earnings ratio was 104.98 times higher than the industry average. There is a risk of irrational hype and rapid decline. The company's 60 million yuan to 120 million yuan share repurchase was completed on September 10. For the first time, 6.5463 million shares were repurchased, accounting for 0.53% of the total share capital, and a total transaction of 120 million yuan. There is no new repurchase plan yet. According to verification, PCBs related to the company's AI servers account for no more than 10%. PTFE-based PCBs do not involve high-speed servers, have no business relationships with Huawei Mate XT2 and Kirin 9050 Pro chips, and the subsidiary Proway packaging substrates do not involve processes such as hybrid bonding. In the first half of 2026, the company's revenue was 4.330 billion yuan, up 22.55% year on year; net profit to mother was 152 million yuan, down 31.30% year on year. Higher raw material prices are squeezing gross profit, and there is uncertainty about the effects of structural price increases. After verification, the company, controlling shareholders, and actual controllers had no important matters that should have been disclosed, and none of the directors, supervisors, controlling shareholders, and actual controllers traded the company's shares during the change period.

According to the Chongda Technology announcement, the cumulative deviation value of the company's stock price increase exceeded 20% for three consecutive trading days on September 11, September 14, and September 15, 2026, which is an abnormal fluctuation in stock trading. Since August 2026, the company's stock price has accumulated a cumulative increase of 90.50%. It experienced abnormal fluctuations in September twice. As of September 15, the rolling price-earnings ratio was 104.98 times higher than the industry average. There is a risk of irrational hype and rapid decline. The company's 60 million yuan to 120 million yuan share repurchase was completed on September 10. For the first time, 6.5463 million shares were repurchased, accounting for 0.53% of the total share capital, and a total transaction of 120 million yuan. There is no new repurchase plan yet. According to verification, PCBs related to the company's AI servers account for no more than 10%. PTFE-based PCBs do not involve high-speed servers, have no business relationships with Huawei Mate XT2 and Kirin 9050 Pro chips, and the subsidiary Proway packaging substrates do not involve processes such as hybrid bonding. In the first half of 2026, the company's revenue was 4.330 billion yuan, up 22.55% year on year; net profit to mother was 152 million yuan, down 31.30% year on year. Higher raw material prices are squeezing gross profit, and there is uncertainty about the effects of structural price increases. After verification, the company, controlling shareholders, and actual controllers had no important matters that should have been disclosed, and none of the directors, supervisors, controlling shareholders, and actual controllers traded the company's shares during the change period.