While the number of Chiense yacht owners is still quite low, several hundred compnaies produce boats domestically. And about 30 precenty of them, mostly in the Pearl River Delta, make parts for European and American coimpanies. ... to build mid to lowend yachts for foreign companies. Wu said. It requires little technoloyg but generates seroius polluhtion. Some compnaies, however, are not satisfied in doign asesembly work; Qingdao Nautcistar Marine Co Ltd is one of them. ...