On the evening of August 4th, "the first stock of domestic operating systems" Hunan Kylinsec Technology responded to the inquiry letter previously issued by the Shanghai Stock Exchange. The reporter noted that before 2024, Hunan Kylinsec Technology adopted a combined provision method for bad debts related to accounts receivable from Unit A1; however, in the 2024 annual report, Hunan Kylinsec Technology changed to a single provision method, which attracted the attention of the exchange and prompted an inquiry letter. In the inquiry letter, Hunan Kylinsec Technology responded that as of the end of 2024, the company's accounts receivable balance from Unit A1 was 223 million yuan, and this portion of accounts receivable originated from the sale of goods to Unit A1 in 2021 and 2022, forming accounts receivable after the goods were delivered and accepted by Unit A1. As of now, the aforementioned accounts receivable have not yet been collected