
Overseas Chinese attend a see-off ceremony of two Chinese navy ships at the port city of Vladivostok, Russia, on Aug. 2, 2011. The training ship "Zheng He" and the frigate "Luoyang" arrived here for a four-day visit. The two ships left Russia for the Democratic People's Republic of Korea (DPRK) on Tuesday. [Photo: Xinhua/Zha Chunming]

Sailors on Chinese navy ships attend a see-off ceremony at the port city of Vladivostok in Russia's Far East on Aug. 2, 2011. The training ship "Zheng He" and the frigate "Luoyang" arrived here for a four-day visit. The two ships left Russia for the Democratic People's Republic of Korea (DPRK) on Tuesday. [Photo: Xinhua/Zha Chunming]

Chinese navy ships leave the port city of Vladivostok in Russia's Far East after a visit on Aug. 2, 2011. The training ship "Zheng He" and the frigate "Luoyang" arrived here for a four-day visit. The two ships left Russia for the Democratic People's Republic of Korea (DPRK) on Tuesday. [Photo: Xinhua/Zha Chunming]

Chinese training ship "Zheng He" leaves the port city of Vladivostok in Russia's Far East after a visit on Aug. 2, 2011. The training ship "Zheng He" and the frigate "Luoyang" arrived here for a four-day visit. The two ships left Russia for the Democratic People's Republic of Korea (DPRK) on Tuesday. [Photo: Xinhua/Zha Chunming]