China's Jia Hongguang expressed surprise after setting a new world record in the men's 100m backstroke S6 at the Rio Paralympics on Thursday.[Special coverage]
The 28-year-old clocked 1:12.27, beating the previous record set by his countryman Zheng Tao last year.
"Wow, I just did really well - that was not what I was planning," Jia said.
"My family back in China will be really happy for me, sure - but breaking the world record in the heat doesn't mean I've won a gold medal."
The final of the event was due to be held on Thursday evening, local time.
Jia is competing in his second Paralympic Games, having won a silver medal in the same event in London four years ago.
His left arm and half of his right arm were amputated at age six after he accidentally touched an electrical wire.
