China claimed another 13 gold medals -- including four in the pool -- to surge further clear at the top of the Rio Paralympic standings on Sunday.[Special coverage]
The Asian nation has now won 39 gold medals, 16 more than second-placed Britain and 21 more than Ukraine, who are third.
Sunday's fourth day of competition saw China win four gold medals in swimming, three in athletics, two each in table tennis and powerlifting, and one apiece in shooting and archery.
Powerlifter Tan Yujiao was one of several Chinese athletes to set new world records as she clinched gold in the women's - 67kg Group A.
Tan lifted 138.5kg with her final attempt to beat her own record of 138kg set in Hungary last year.
Kazakhstan's Raushan Koishibayeva took silver with 113kg and Egypt's Amal Mahmoud bronze with 108kg.
"I didn't really think of how all the others would perform or what they're doing," Tan told the Paralympic News Service. "I just focus on myself because I think this sport is where you compete against yourself, the only one I have to defeat is myself."
"The training is like a daily routine so it is really hard to keep going but I still take a shine to it and I have determination. That's how I come to this level and I'm happy about that."
Tan, who was born with one leg longer than the other, was a silver medallist at the London 2012 Games.
She said she had improved immeasurably over the past four years.
"I was 22 years old back then and I've learned a lot of different things since so it is not like the old times," she said.
"It really comes down to being more mature and having more determination. I think the most important thing was my passion for this sport."
Another to break a world record was Zhou Hongzhuan as she secured gold in the 400m T53.
The 27-year-old clocked 54.43 seconds to eclipse the previous benchmark of 54.69 set by Australia's Angela Ballard in June.
"I am very happy and excited to win this medal because I trained a lot but I did not expect to win," Zhou said.
It was Zhou's fourth Paralympic gold medal. In addition to Sunday's triumph, Zhou won the 400m T53 and 800m T53 in London four years ago, and the 800m T53 at the Beijing 2008 Games.
She also took silver in the women's 100m T53 on Thursday. Zhou's leg impairment is the result of polio.
Liu Benying also set a new world record as he grabbed gold in the 200m freestyle S2.
The 20-year-old clocked three minutes 41.54 seconds to beat the previous record held by countryman Zou Liankang by almost eight seconds.
Zou took silver in 3:42.58 and Ukraine's Serhii Palamarchuk claimed bronze in 3:43.69.
Liu's limb impairment is the result of an accident when he was eight.
And Yao Juan broke her own world record to win gold in the discus F44. The 32-year-old threw 44.53m with her first attempt to beat the record she set last year by more than a meter.
Fellow Chinese athlete Yang Yue grabbed silver with a personal best throw of 43.47m and Cuba's Noraivis de la Heras Chibas took bronze with 32.47m.
Yao has now won gold medals at four different editions of the Paralympic Games.
She won the shot put F42/44 title at the London 2012 Games and also triumphed in javelin at Sydney 2000 (F44) and Beijing 2008 (F42-46).
Yao, who suffers from impaired muscle power, took up para-athletics in 1998.
Liu Lei secured his third Paralympic gold medal by winning the powerlifting men's -72kg Group A.
The 28-year-old recorded a best lift of 221kg to defeat Rasool Mohsin of Iraq by just 1kg. Nigeria's Nnamdi Innocent grabbed bronze with a best effort of 210kg.
"I am extremely happy and it means a lot to me, even more than the previous two [gold medals]," Liu said.
