During the early 1990s , Wo Hop To expanded into the United States , beginning in San Francisco . The U.S. Wo Hop To was led by Peter Chong ( 莊炳強 ) ( also known as " Uncle Chong " ) and Raymond " Shrimp Boy " Chow ( 周國祥 ) , a former Hop Sing Boys gang member . The Wo Hop To had plans to control all the Asian gangs in San Francisco and , from there , to branch out into drug distribution nationwide . Wo Hop To chased the Wah Ching gang out of the Bay Area and the Wah Ching headed to Southern California . The Wah Ching was the only surviving Chinatown gang during the 1980s . The Hop Sing Boys and Joe Boys were dismantled by police after the Golden Dragon massacre . The Wo Hop To controlled Chinatown illegal activities after killing the Wah Ching leader Danny Wong
Golden Dragon massacre
Golden Dragon massacre
Wo Hop To