Four years later , he won the gold medal in the men 's singles competition and the silver medal in the doubles event again together with Liu Guoliang .
In 1996 , Kong won the gold medal in the men 's doubles competition together with Liu Guoliang .
Four years later , Kong won the gold medal in the men 's singles competition and the silver medal in the doubles event again together with Liu Guoliang .
In 1996 , Kong won the gold medal in the men 's doubles competition together with Liu Guoliang .