[Changyingtong: Signed a sales order for polarization-maintaining optical fiber products worth 147 million yuan] On September 29, Changyingtong (688143.SH) announced that the company recently received a purchase order for polarization-maintaining optical fiber products from a customer, with a total amount of tentatively estimated at 147 million yuan (tax included). This transaction is a sales order for the company's daily operations. If successfully implemented, it is expected to have a positive impact on the company's operating performance. The unit price of the order is a tentative price, and the final price will be calculated based on the framework agreement. The company has exempted some information such as customer names and product specifications from disclosure.