SHANGHAI says a successful East Asian Games next month will help prove China's ability to host the 2000 Olympics. ''We believe that through hosting the games we can show the world a new image of Shanghai,'' said Vice-Mayor Mr Gong Xueping, secretary-general of the First East Asian Games. ''We also want to show the world Beijing's full confidence, resolution and capability in bidding for the 2000 Olympic Games.'' China, Japan, North and South Korea, Mongolia, Taiwan, Hongkong and Macau will take part in the Shanghai games. International Olympic Committee president Mr Juan Antonio Samaranch and 23 other members of the IOC are expected to attend. More than 1,872 athletes and technical officials will take part in the Games, to be held from May 9 to 18. Mr Gong said the organisation had been completed without relying on state money. Sufficient funds had been ''raised from society'', he said. As part of its effort, a Shanghai newspaper yesterday issued a list of ''do's and don'ts'' for citizens. It called on the people of Shanghai to be courteous, use civilised speech and treat guests warmly. But residents should refrain from using dirty words, spitting, littering, cursing, beating up others and appearing cold to visitors, it said.