![Chinese air force planes fly through Tsushima Strait for first time(2/2)](http://www.ecns.cn/hd/2017/12/19/f81329e612c449e78e251da0166fbb17.jpg)
A Chinese air force plane takes off to conduct drills in international airspace over the Sea of Japan, Dec. 18, 2017. Chinese air force planes Monday flew through Tsushima Strait for the first time and conducted drills in international airspace over the Sea of Japan, an air force spokesperson said. (Xinhua/Zhang Haishen)