They defeated Japanese duo Tomokazu Harimoto and Hina Hayata 11-6, 11-2, 11-7 to seize the title.

 Wang and Sun were awarded the Heydusek Cup following their win over the number two pair.

"This win is extremely precious and important to us," Wang said.

"The first time we won our mixed doubles was in Houston, and this time, we adopted a fighting mentality and just focused on giving our best.

"As this is the second time that we are competing in the World Championships mixed doubles final, we put in a lot of effort together with the coaches and team China." 

China and South Korea will battle it out for the men's and women's doubles titles.

In the men's doubles, Wang paired up with Tokyo 2020 Olympic team champion Fan Zhendong to defeat Lee Sang-su and Daeseong Cho of South Korea 7-11, 11-3, 11-5, 14-12.

Jang Woo-jin and two-time World Championships medallist Lim Jong-hoon made up for South Korea in the other semi-final, as they edged to six-time Olympic medallist Dimitrij Ovtcharov and Patrick Franziska of Germany.

The South Koreans won 7-11, 11-5, 11-8, 9-11, 5-11.

The women's doubles semi-final saw an upset as Shin Yubin and Jeon Jihee of South Korea stunned defending champions Sun Yingsha and Wang Manyu of China 11-7, 11-9, 11-6.

The Chinese pair lifted the trophy in 2019 and 2021 but bowed out in Durban as the South Koreans troubled them with gorgeous forehand and backhand counters.

Sun and Wang's compatriots and Tokyo Olympic champion Chen Meng and Wang Yidi reached the final after getting the better of Japan's Miyuu Kihara and Miyu Nagasaki 8-11, 11-6, 11-5, 13-11.

In the women's singles, Hina Hayata secured a medal for Japan, matching Miu Hirano's run to the semi-finals in 2017.  

Hayata defeated Yidi 4-11, 11-3, 11-9, 6-11, 11-9, 8-11, 21-19, in what was a dramatic quarter-final.

Meanwhile, defending champion Wang of China crashed out against compatriot Chen Xingtong.

Chen took four straight game wins to despatch the reigning champion 11-5, 11-8, 11-8, 11-9.

Egyptian Omar Assar's dream run came to an end as he exited the tournament at the quarter-final stage in the men's singles.

World number one and defending champion Fan Zhendong of China was too hot to hand for Assar, who lost 7-11, 11-13, 3-11, 7-11.