A helicopter is pictured on the patrol vessel Haixun01 in Shanghai, east China, April 15, 2013. Haixun 01, soon to be put into service and managed by the Shanghai Maritime Bureau, is China's largest and most advanced patrol vessel. The 5,418-tonnage Haixun01 is 128.6 meters in length and has a maximum sailing distance of 10,000 nautical miles (18,520 km) without refueling. It will carry out missions regarding maritime inspection, safety monitoring, rescue and oil spill detection and handling. [Photo/Xinhua]