A guided-missile destroyer attached to a naval flotilla under the PLA Southern Theater Command fires its auxiliary gun at mock sea targets during a combined arms training exercise. The flotilla under training has traveled more than 8,000 nautical miles in over 30 days, conducting dozes of exercise items including air and missile defense, anti-terrorism and anti-piracy operation, and joint search and rescue. (eng.chinamil.com.cn/Photo by Cheng Jiahao)