Is AVIC Saiwei Airlines a state-owned enterprise in Beijing?

Of course not. Saiwei Avionics was established by 10, a subsidiary of AVIC. It is the actual controller and a member of AVIC. AVIC is a state-owned enterprise supervised by the State Council SASAC, and it is an out-and-out central enterprise. Beijing SASAC has no authority to supervise Saiwei Avionics, which should be regarded as a central enterprise rather than a state-owned enterprise owned by Beijing.