What is the unit of jiaozhou city No.7 Company?

Hehe, I'm from company seven. The Seventh Company is the resident unit of the Central Committee in China, the full name of which is the Seventh Construction Company, and it is a construction company under the China Petroleum and Natural Gas Group Corporation. PetroChina is a comprehensive group, and the construction company is responsible for downstream construction, that is, the construction of refineries and petrochemical plants, but not for upstream industries such as oil exploration and exploitation. If it is a worker, the most types of work are welders (welding tanks, steel structures, etc. ), fitter, plumber, riveter, etc. There are many managers, such as budget, architecture and design.