Tokyo 2020 runner-up Sun Yingsha sealed victory in the first women's match against compatriot and 2021 World Championships bronze medallist Wang Yidi.

The 21-year-old prevailed 11-6, 11-4, 4-11, 14-12, 11-6 in under 50 minutes at the Infinity Arena.

She is set to meet Olympic champion Chen Meng, who also triumphed 4-1 in an all-Chinese battle, in a rematch of the postponed Games' final in Japan last year.

Victor of last year's individual world title, Wang Manyu was on the losing end in less than an hour this time by an 11-9, 11-3, 11-9, 13-11, 11-6 score line.

"Today's match was really intense and our rallies were of a high quality," Chen said.

"Manyu followed me tightly in the first few games, especially in the fourth game where she was tenacious and chased me very hard.

"I also made some mistakes, but we are all of a similar level so I didn't think too much.

"I just focused on the shots and in the last game I was decisive."

WTT Champions Macao winner Wang Chuqin of China held off a valiant comeback from countryman and second seed Ma Long in the men's singles semi-final.

Wang raced into a 3-0 lead and despite a shift in momentum that brought the scores level he saw out the win 11-7, 11-5, 11-5, 9-11, 7-11, 11-13, 11-8.

"Although I won, I wouldn’t say I'm much better than Ma Long when it comes to the details and understanding of the match," said Wang.

"Every event is a new start.

"I didn't have pressure in Macao, so I was able to play openly and enjoy the game, but here it's a little different as I feel a lot more pressure.

"But I feel I should maintain the calm attitude to play the game one shot at a time."

Awaiting the 22-year-old in the final is last year's runner-up Tomokazu Harimoto of Japan after her crushed German former world number one Dimitrij Ovtcharov 11-7, 11-6, 11-5, 11-7.