On the morning of July 31, the audit team of Beijing World Standard Certification Center visited Dubesite for guidance and review. Du Hongsite's general manager Zhu Hongwei and department management staff warmly received the audit team and introduced the company's production and operation status to the audit team this year.

The audit team reviewed the management documents and related systems of Dubest for 15 years and 16 years. The Dubester R&D Department and the Production Department and other relevant program documents were reviewed, and the Dubest related department file system was affirmed, and relevant opinions and suggestions were put forward. As of 17:00 pm, the review was successfully completed.