China's sixth gold medal out of nine events was won in the women's 63 kg class.
Russians were on top at the women's 69 kg class.
He won the gold medal in the freestyle 96 kg class.
In 2000 he finished fourth in the 62 kg class.
Four years later he won the silver medal in the 62 kg class.
In 2006 he raised his weight to compete in the 120 kg class.
There she won a second Olympic medal, this time a bronze in the 48 kg class.
He was suffering from a shoulder injury in 2003 and temporarily moved to the 62 kg class.
In 1996 he won the gold medal in the 70 kg class.
Four years later he won the gold medal in the 77 kg class.