A look-out of the guide-missile destroyer Shenyang observes the state of sea on August 17. Seven Chinese warships, on their way to participate in the China-Russian naval exercise codenamed Joint Sea-2015 (II) to be held in the Peter the Great Gulf, waters off the Clerk Cape, and the Sea of Japan from August 20 to 28, successively sailed through the Tsushima Strait connecting the Sea of Japan and the East China Sea on August 17, 2015. (Photo: Chinamil.com.cn/Ren Xu)
