China's large passenger aircraft, the C919, is seen at the assembly line in Shanghai, east China, February 13, 2018. (Photo: Ding Ting/ Xinhua)

The designer of China's C919 commercial plane says the first unit will be turned over to China Eastern Airlines by 2021 at the deputy's corridor during two sessions.

Wu Guanghui said six C919 airliners will undergo over 1,000 tests in the next three years.

Wu Guanghui, depety of 13th NPC. (Photo: People's Daily Online)

The C919 is China’s first domestically-built large passenger jet and was designed with the world’s most advanced technology. COMAC, which developed the plane, possesses key intellectual properties and technical specifications, Wu said. 

Statistics of C919. (Photo: COMAC)

He explained that a lithium-aluminum alloy and composite of carbon fiber are used to construct the jet to provide security, comfort, economy and environmental friendliness.