The "Yanmen" series of product doors have successfully passed the testing conducted by the quality inspection center of the relevant national department, and have been recommended as "green and environmentally friendly products" and "recommended products for engineering construction" by the "China Engineering Construction Association" and the "Building Materials Professional Committee of the China Engineering Construction Association".

Immediately afterwards, he was elected as a "National Door Industry Standing Committee Unit" at the "National High-Tech Building Materials Advanced Conference". At the same time, he was awarded the title of "Top 30 High-Tech Door Industry Enterprises (Brands) in China" by the "National High-Tech Building Materials Industrialization Committee".

Instructions:

1. The certificate number for "Green Environmental Protection Product" is "ZGJHZi No. 15366585"; the certificate number for "Recommended Product for Engineering Construction" is "ZGJJZi No. 63822653". You can check these by entering the certificate number on the official website of the "China Engineering Construction Association".

2. The "Top 30 High-Tech Door Industry Enterprises (Brands) in China" certificate can be verified by entering the certificate number: chcbm2008011 on the official website of "China Door Industry Network" hosted by the "National High-Tech Construction and Production Committee Door Industry Committee".