SHANGHAI -- China's domestically-developed ARJ21 regional aircraft is undergoing its commercial operation phase by linking 38 cities from home and abroad, according to its developer Thursday.

The ARJ21 passenger jetliners have carried a total of 690,000 passengers on 37 air routes, said the Commercial Aircraft Corporation of China (COMAC).

Developed by the COMAC, the ARJ21 is China's first turbo-fan regional passenger jetliner. It was put into commercial service for the first time in June 2016.

To date, the COMAC has delivered a total of 22 ARJ21 airplanes.

On Oct 26, 2019, the ARJ21 aircraft started its first international service between the northeastern Chinese city of Harbin to Vladivostok in Russia's Far East, marking a major step for the jetliner in commercial operation, said the COMAC.