Russian marine soldiers watch performance in Qingdao, East China's Shandong province, April 23, 2012. Various activities were held on Monday here by soldiers who were involved in the recent Russia-China joint naval exercise, to celebrate the 63rd founding anniversary of the Chinese navy. (Xinhua/Zha Chunming)

Chinese marine soldiers show battle skills during an event in Qingdao, East China's Shandong province, April 23, 2012. Various activities were held on Monday here by soldiers who were involved in the recent Russia-China joint naval exercise, to celebrate the 63rd founding anniversary of the Chinese navy. (Xinhua/Zha Chunming)