ST Na Chuan: The amount involved in the subsidiary's case is 18.1892 million yuan.

ST NaChuan announcement: Subsidiary Sichuan NaChuan Pipe Co., Ltd. has received a summons and a notice of litigation from the People's Court of Anzhou District in Mianyang City, Sichuan. The case filed by Sichuan Hengcheng Tongtai Construction Technology Co., Ltd. against Sichuan NaChuan Construction Engineering for a construction contract dispute has been accepted. The plaintiff claims that the construction settlement cost is 30.965 million yuan, with 14.602 million yuan of unpaid project funds and 3.2872 million yuan of interest, and requests the defendant to bear the lawyer's fees and other expenses. The case has not yet been heard, and there is uncertainty regarding the impact on the company's current or future profits.