General Chen Bingde (L), chief of the General Staff of the Chinese People's Liberation Army, and US Admiral Mike Mullen, chairman of the Joint Chiefs of Staff, review an honor guard together during a welcoming ceremony for Mullen at the Bayi Building in Beijing July 11, 2011. [Photo/Agencies]

Special police members crawl through mud during a physical training in Chengdu, the capital of Southwest China's Sichuan province, July 11, 2011. The squad kicked off a week-long training schedule, its hardest of the year, in Longquan Mountai in Chengdu, in an attempt to push the soldiers' mind-sets as well as physical conditions to the limit, thus enhancing their abilities to conduct various missions. [Photo/Xinhua]