The 25-year-old Du, who set a new Paralympic record in the morning's heat at 1 minute and 42.95 seconds, took the winning time further down to 1:35.21 in the finals, shaving 5.87 seconds of the former world mark.

"I only won a silver last time, missing the gold, which I had wanted badly for three years. This time I competed on the home ground and it made me feel more excited and special," said the winner.

Du led the lane throughout the first lap but met strong challenge from Dmytro Vynohradets' comeback.

The Ukrainian splashed powerfully after the turn and narrowed the gap to about half a body length in the final 25 meters. But Du made a desperate sprint to keep the minor lead and touched the wall first with a 0.44 winning margin.

"I was in my best shape today. I held my breath all the time and I thought it worthwhile even if I got choked," added Du. His compatriot Li Hanhua grabbed the bronze in 1:44.22.

Du won two golds in 50m backstroke and 150m medley events at Athens Paralympics. He will take part in 200m and 50m freestyle on Tuesday and Saturday respectively, aiming to propel the hosts to consolidate the dominant role in the pool.

In Athens, China finished atop of the swimming medals table with 19 golds.

Beijing Paralympic swimming competitions have attracted 560 athletes in 81 men's and 59 women's events. The nine-day contest, held at the National Aquatics Centre "Water Cube", runs from September 7 to 15.