He attended an international competition for the first time in 1987, and won the title. He has since competed at the Olympic Games, winning 3 gold, 1 silver and one bronze medals; In addition, he has won 10 gold medals in the World Cup competition.
In 1993, Xiong graduated from the Hunan University international business school, specialising in industry and foreign trade In 1997 and once again in 2001 after national games he announced his intention to retire.
His biggest competitor Dmitri Sautin once paid him the tribute that, "I cannot claim to be the world's most outstanding diving athlete. In my opinion, the title of "King of Divers" belongs to Xiong Ni"
In January, 1986 was selected for the national training center.
In 1986 quadruple champion of the 1 meter board, 3 meters board, 5 meter platform and overall champion in the Chinese national diving championship (div 2)
in 1987 in DDR, Canada, Mexico etc. in the international diving invitational meet, wins the men's platform diving event
in 1987 silver medals for men's springboard and the diving platform event at the Sixth National Sports Championships
in 1988 won the platform diving event at the 3rd Asia swimming championships in Guangzhou
in 1988 silver medal in the men's platform diving at the Seoul Olympic Games
in 1988 dual champion of men's springboard, and diving platform in the Swedish cup international championships
in 1989 triple winner in the 6th session of World Cup diving championships for platform diving, the men's group event and the men and women mixed event
in 1989 two gold medals in the 2nd National Youth Games diving competition in the diving platform and the springboard events
in 1991 dual champion at the 7th World Cup diving championships in Canada for the men's group event and the men and women (mixed) events
in 1992 Bronze medal at the Barcelona Olympic Games for platform diving
in 1993 1 meter board champion at the seventh National athletic meet
in 1993 triple winner in the 8th World Cup diving tournament held in Beijing, in 10 meters diving platforms, men's (group) event and the men and women (mixed) event
in 1995 double winner in the 9th session of World Cup diving Championships in Atlanta, in the men's (group) event and the men and women (mixed) event
in 1996 champion, 3 meters board at the Atlanta Olympic Games,
in 1997 springboard champion at the eighth national Championships, announces retirement.
In May, 1998 announced he was coming out of retirement.
In 1999 Wenzhou international invitational tournament springboard champion, the Sweden grand prize contest springboard champion, the national championship competition springboard and the two person champion
in 2000 wins the springboard two person event in the World Cup, partnered by Xiao Hailiang
in 2000 gold medal at the Sydney Olympic Games in the men's 3 meters boards synchronised event, with Xiao Hailiang, and gold medal in the men's 3 meters boards individual
in 2001 after winning the men's 3 meters springboards singles event at the ninth national athletic meet, Xiong once more announces his retirement.