No.263 Chaoyang District Popularity Ranking Beijing No.2 Rubber No.3 Zhi Hydrogen No.3 Qi Ti Ran Materials No.3 Lian Jiao No.3 Jiao Chemical No.4 HSE No.5 Polyethylene PE No.5 Ye Hua Tian Ran Gases No.5 Construction Management No.5 Coal Gases No.5 Petrochemicals Engineering No.5 Coal 省部级科技进步奖 科技进步奖 理事单位 国家高新技术企业 常务理事单位 高新技术企业 ISO9001认证 ISO14001认证