China debuted its new J-31 stealth fighter jet yesterday at the biannual international air show in the Guangdong province city of Zhuhai, South China Morning Post reported. The air show also displayed an acrobatic performance of China’s J-10 jet fighters, which was the first time the air force’s “August 1st” aerobatic and parachute team included women pilots, who flew half of the six jet squadron. With the debut of the J-31, China is now the only country besides the U.S. to have two stealth fighter designs in field testing at the same time.