1.In December of 2015, Beijing Delfa got approval of ISO9001:2008 certification

2.In June 6, 2018, Beijing Delfa got approval of ISO9001:2015 certification

3.In May 6, 2021, Beijing Delfa got approval of ISO9001:2015 certification

4.In April 29,2024,Beijing Delfa got approval of ISO9001:2015 certification