China Simulation Science (Shanghai), Ltd. is dedicated to becoming a leading Chinese supplier of civil aviation simulation training equipment, with its core business centered on the design, research, and development of high-level aviation simulators. Products developed by CSS　possess complete independent intellectual rights.

The first Level D simulator developed by CSS with independent intellectual property rights successfully passed the initial qualification of the Civil Aviation Administration of China (CAAC) in 2020 and later was officially delivered to an airline for operational use in the same year.

Relying on a mature, stable, and fully autonomous core simulation system and software simulation framework, CSS has further established a comprehensive product platform and product system. Its product line covers into two major aircraft types: Airbus A320 and Boeing B737 MAX. CSS is the only training device manufacturer (TDM) in China manufactures Level D simulator that qualifies by both CAAC and EASA.