2. Changqing Oilfield Company: Changqing Oilfield is the largest oil and gas field in the inland of China. Founded in 1970, with more than 70,000 employees and total assets exceeding 1000 billion yuan, it provides stable energy supply for many cities.
3. Gansu Telecom Co., Ltd.: As a major telecom operator in Gansu Province, it was established in 2004, taking on the responsibilities of telecom services in the province and being the core force of the communication industry.
4. Guodian Lanzhou Thermal Power Co., Ltd.: Founded in 1990, it is mainly engaged in electric heating and water supply projects and is one of the important energy supply enterprises in Lanzhou.
5. Datang Group Gansu Branch: Mainly engaged in the production and supply of electricity and heat. Founded in 2004, it is one of the important power supply enterprises in Gansu Province.
6. China Petroleum Lanzhou Petrochemical Company: a subsidiary of China Petroleum, established in 1958, is an important petrochemical enterprise in Lanzhou and even Gansu Province.
7. Gansu Tobacco Monopoly Bureau: responsible for tobacco monopoly in Gansu Province. Founded in 1984, it plays an important role in the management and standardization of tobacco market.
8. Gansu Electric Power Company: It belongs to State Grid Co., Ltd., undertakes the construction and operation tasks of power grid in Gansu Province, and plays an important role in power supply in Gansu Province.
9. Gansu Post Office: As a postal service provider, it was established in 2006 and is responsible for postal services in Gansu Province, including delivery services such as letters and parcels.
10, Lanzhou Shi Lan group co., ltd: this is a large-scale high-end energy equipment leading enterprise, which was established in 1953, and its business covers oil drilling, oil refining, general machinery research and development, design and manufacturing, etc.