Is Lanzhou Shi Lan Group a state-owned enterprise or a central enterprise?

Lanzhou Shi Lan Group is a state-owned enterprise. State-owned enterprises are state-owned enterprises, state-owned enterprises and enterprises owned by the whole people, not private enterprises, private enterprises or foreign enterprises. Shi Lan Group is one of the two national key construction projects during the First Five-Year Plan 156, which was formed by the merger of Lanzhou Petrochemical Machinery Factory and Lanzhou Refining and Chemical Equipment Factory.