According to the Chongda Technology announcement, the cumulative deviation value of the company's stock closing price increase exceeded 20% for three consecutive trading days on September 7, September 8, and September 9, 2026, which is an abnormal fluctuation in stock trading. As of September 9, 2026, the company's rolling price-earnings ratio was 87.53 times, higher than the rolling price-earnings ratio of 66.54 times that of the printed circuit board industry. There is a risk of a rapid decline due to overheated market sentiment and irrational hype. According to verification, in 2025 and the first half of 2026, the company's AI server-related PCB product revenue did not account for more than 10% of the total business, which had limited impact on current performance; PTFE substrate PCBs were mainly used in the communication field and did not involve high-speed server business; there was no business relationship with Huawei Mate XT2 and Kirin 9050 Pro chips; the subsidiary Proway's SIP/mSAP packaging substrates did not involve hybrid bonding, TSV, 2.5D/3D packaging processes. In the first half of 2026, the company achieved operating income of 4.330 billion yuan, a year-on-year increase of 22.55%; net profit to mother was 152 million yuan, a year-on-year decrease of 31.30%; deducted non-net profit of 148 million yuan, a year-on-year decrease of 31.99%. Affected by the rise in the price of core raw materials, the company implemented structural price increases, and there is uncertainty about the results. After verification, the company, controlling shareholders, and actual controllers had no important matters that should have been disclosed but not disclosed. The controlling shareholders, actual controllers, directors and supervisors did not trade the company's shares during the change period.

According to the Chongda Technology announcement, the cumulative deviation value of the company's stock closing price increase exceeded 20% for three consecutive trading days on September 7, September 8, and September 9, 2026, which is an abnormal fluctuation in stock trading. As of September 9, 2026, the company's rolling price-earnings ratio was 87.53 times, higher than the rolling price-earnings ratio of 66.54 times that of the printed circuit board industry. There is a risk of a rapid decline due to overheated market sentiment and irrational hype. According to verification, in 2025 and the first half of 2026, the company's AI server-related PCB product revenue did not account for more than 10% of the total business, which had limited impact on current performance; PTFE substrate PCBs were mainly used in the communication field and did not involve high-speed server business; there was no business relationship with Huawei Mate XT2 and Kirin 9050 Pro chips; the subsidiary Proway's SIP/mSAP packaging substrates did not involve hybrid bonding, TSV, 2.5D/3D packaging processes. In the first half of 2026, the company achieved operating income of 4.330 billion yuan, a year-on-year increase of 22.55%; net profit to mother was 152 million yuan, a year-on-year decrease of 31.30%; deducted non-net profit of 148 million yuan, a year-on-year decrease of 31.99%. Affected by the rise in the price of core raw materials, the company implemented structural price increases, and there is uncertainty about the results. After verification, the company, controlling shareholders, and actual controllers had no important matters that should have been disclosed but not disclosed. The controlling shareholders, actual controllers, directors and supervisors did not trade the company's shares during the change period.