On Monday, the Shandong, commissioned in 2019 as China's second aircraft carrier, conducted landing and takeoff drills involving its fighter jets and helicopters north of the Okinotori, some 1,700 km south of Tokyo, within Japan's exclusive economic zone, the ministry said. Meanwhile, the Liaoning, along with two destroyers and another vessel, was spotted in waters approximately 300 km southwest of Minamitori, which is located around 1,900 km southeast of Tokyo, at around 6 p.m. Saturday, according to the ministry. The area lies within Japan's Exclusive Economic Zone (EEZ). The Liaoning then moved southwest and conducted landing and takeoff drills with its fighter jets and helicopters on Sunday outside the Exclusive Economic Zone (EEZ). The Liaoning was observed beyond what is known as the "second island chain", stretching from Japan's Izu Islands to Guam, a Japanese government official said. China considers the chain its defence line.