The PLA Navy was ranked in 1987 as the third largest navy in the world, although naval personnel had comprised only 12 percent of PLA strength. In 1987 the Navy consisted (as it does now) of the naval headquarters in Beijing; three fleet commands — the North Sea Fleet, based at Qingdao, Shandong; the East Sea Fleet, based at Shanghai; and the South Sea Fleet, based at Zhanjiang, Guangdong — and about 2,000 ships. The 350,000-person Navy included Naval Air Force units of 34,000 men, the Coastal Defense Forces of 38,000, and the Marine Corps of 56,500. Navy Headquarters, which controlled the three fleet commands, was subordinate to the PLA General Staff Department. In 1987, China's 1,500 km coastline was protected by more than 100 diesel-powered Romeo- and Whiskey-class submarines, which could remain at sea only a limited time. Inside this protective ring and within range of shore-based aircraft were destroyers and frigates mounting Styx antiship missiles, depth-charge projectors, and guns up to 130mm. Any invader penetrating the destroyer and frigate protection would have been swarmed by almost 900 fast-attack craft. Stormy weather limited the range of these small boats, however, and curtailed air support. Behind the inner ring were Coastal Defense Force personnel operating naval shore batteries of Styx missiles and guns, backed by ground force units deployed in depth.
Recent paper on the PLAN. http://www.navyleague.org/seapower/chinas_navy_today.htm