On December 12, * ST Changyao announced that its subsidiary, Hebei Yiheng Science and Technology Co., Ltd. (Hereinafter referred to as "Yiheng Science and Technology"), had recently stopped production .
As for the reasons for the shutdown, * ST Changyao explained in the announcement: In view of the current competitive environment in the photovoltaic industry and the current situation of Yiheng Science and Technology , which is short of funds and continues to lose money . In order to avoid further expansion of losses and reduce operating costs , Yiheng Science and Technology recently decided to stop production. The follow-up will decide whether to resume production according to market conditions. "
Data show that Yiheng Science and Technology, founded in June 2000, is a high-tech enterprise that develops and produces solar cell module equipment in China.". In the first three quarters of 2025, Yiheng Technology realized a revenue of 61.1555 million yuan and a net profit loss of 26.8548 million yuan . As of September 30, 2025, the total assets of Yiheng Science and Technology were 139 million yuan, and the net assets were-64 million yuan .

Source: Yiheng Science and Technology Official Website
For the shutdown of Yiheng Science and Technology, * ST Changyao said that the shutdown of Yiheng Science and Technology would reduce the company's operating losses, reduce its negative impact on the company's performance, avoid larger-scale losses and capital investment caused by continued production, and help to reduce operating costs. It is in line with the company's strategic development direction of focusing on the pharmaceutical industry.
At the same time, * ST Changyao said that the company has arranged the senior management team of Yiheng Science and Technology to do a good job of disposal during the shutdown period, and has arranged Yiheng Science and Technology to set up a special collection class to collect the payment as soon as possible. Give priority to solving the problem of salary arrears of employees. Yiheng Science and Technology will decide whether to resume production and operation according to market conditions, and actively seek opportunities for foreign cooperation, make full use of the remaining use value of assets, and minimize the impact of the shutdown of Yiheng Science and Technology.
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