Quake-affected Chinese students wave their hands to Russian friends and teachers at the "Ocean" All-Russia Children's Center, Russia, August 4, 2008. About 200 visiting students from China's quake-hit Sichuan Province wound up their vacation in Russia and set out home.  Some 1,000 students from China's quake-affected provinces have arrived in Russia since July 17 for three-week rehabilitation programs. [Xinhua]