At the beginning of its establishment, China Oil and Gas Construction No.1 Company participated in the cultivation and construction of "Five Golden Flowers", the first milestone in the history of refining development in New China. In the following 50 years, more than 200 sets of atmospheric and vacuum distillation, catalytic cracking, reforming, hydrogenation, hydrocracking, ethylene, ethylene glycol, polypropylene and polyethylene were built for more than 50 large and medium-sized refineries and chemical plants in China, and 28 petrochemical projects were created. The contracting field involves petrochemical, natural gas, offshore engineering, metallurgy, pharmacy, municipal administration, electric power and other industries. In Albania, Iraq, Kuwait, Sudan, Pakistan, Japan, Thailand, Algeria, Singapore, United Arab Emirates, Chad and other countries to undertake foreign projects. , and completed a number of projects imported from Japan, the United States, Germany, Italy, Spain, Canada, South Korea, France and other countries.