May 30-June 1, Beijing Zhong'an Central Authentication Expert Group on the day of hi Holdings, a three-day ISO 9001 (Quality Management System), ISO14001 (Environmental Management System), OHSAS18001 (Occupational Safety and Health Management System)The three system certification review. The expert group through interviews, observation of activities and review of documents, records inspection, audit the operation of the company system, and concluded that the company passed the certification review of the three systems.