(CNN) -- China's star hurdler Liu Xiang bounced back from his Olympic Games disappointment to claim his third successive Asian Games gold medal, but Wednesday's action was marred by a second positive drug test by a Uzbekistani athlete. Liu limped out before his first 110-meters hurdles heat in Beijing two years ago, but has since recovered from an Achilles injury and returned to form on home soil with victory in Guangzhou. The 27-year-old headed off teammate Shi Dongpeng in a record time of 13.09 seconds in front of 80,000 people as he bettered the marks he set in winning in Qatar four years ago and South Korea in 2002.
@highlight
Liu Xiang wins third successive gold at Asian Games, setting another record time
@highlight
Hurdler's gold helps China beat Games record total medals with three days to go
@highlight
It has 352 overall -- 171 of them gold -- to surpass the mark it set in Beijing in 1990
@highlight
Second competitor from Uzbekistan tests positive for a banned stimulant
With three days of competition remaining, China leads with 173 gold medals and 352 in total -- beating its previous record of 342 in @placeholder 20 years ago.