China National Petroleum Corporation (Petrochina)：Projects in Tianjin, Dalian, etc. in total 15 projects before Dec.2019.
The China National Petroleum Corporation (Petrochina) Entities Chengdu Holy has worked with (include but not limited to):
Petrochina Guangxi Branch
Petrochina Daqing Branch
Petrochina Dalian Branch
Petrochina Dagang Petrochemical Co.,Ltd.
Petrochina Daqing Engineering Co.,Ltd.
Petrochina Engineering Qinghai Branch
