Both of China's self-developed jetliners, the C919 and ARJ21, made test flights from Shanghai to Nantong recently, located in east China's Jiangsu Province.

The C919, developed by Commercial Aircraft Corporation of China (COMAC), reached a flight level of 10,000 feet. Both the flight time and area doubled its successful maiden flight on May 5.

A series of tests of the C919 have been conducted since May. The jetliner is set to make intensive flights at the Pudong airport in coming months before it is moved to Xi'an, Shaanxi Province, for further trials.

Separately, the ARJ21 regional jet made a test flight that lasted two hours and 15 minutes at the Shanghai Dachang Airbase, successfully completing nine tests.