The flight tests of J-20 jets are being conducted as scheduled, spokesperson for the Ministry of National Defence Col Wu Qian told a media briefing here.
The J-20 is China's fourth-generation medium and a long-range fighter jet. It made its maiden flight in 2011 and was first shown to the public at the 11th Airshow China in Zhuhai, Guangdong Province, in November last year.
Pakistan has already expressed its interest in acquiring it.
The US air force operates the F-22 Raptor which is the fifth generation stealth air superiority fighter.