The National Aquatic Center, better known as the Water Cube, witnessed another miracle after Michael Phelps' haul of eight Olympic gold medals last month, as his fellow American Erin Popovich won her fourth gold at the Paralympics here on Thursday.

Four events, four gold medals. Popovich's huge success highlighted the action-packed night.

The 23-year-old, who stands 1.34 meters tall, touched the wall first with a new Paralympic-record time of five minutes 17.41 seconds in the women's S7 400m freestyle, beating her compatriot Cortney Jordan by 3.60 seconds.

It was Popovich's fourth straight wins after she claimed titles in 200m individual medley SM7, 100m freestyle S7 and 100m breaststroke SB7.

"I didn't believe I could break 5:20, it was a huge success for me. I also wanted to thank Cortney. She kept the moment up and pushed me to get the whole race. Anyway, I'm very excited," said the winner.

On her victory, Popovich said there was no secret weapon.

"In the morning's heat, I just wanted to go out, made everything comfortable and smooth so that I can push harder in the night.

"My victory is due to a lot of hard work, just it. I have to get the right preparation and did everything that I need to do before every race," she said.

Elsewhere, the closest race of the day came in men's 4X50m freestyle relay. After losing in Wednesday's 4X100m freestyle relay, China's quartet rallied to win their first team event with a strong spurt in the final lap.

When anchor Yang Yuanrun jumped into the pool, he was five meters behind Spanish counterpart. But Yang made a desperate chase with his powerful and speedy stroke, rocketing to catch up with the Spanish at the final 25 meters point.

"I just thought I must breathe as less as I could. Because it's a team event and I cannot let my teammates down. So I let the pressure all behind me when I'm in the water and just tried to swim my best. I only made two breaths and the result paid off." said Yang.