Twins Liuyi and Qianyi Wang reclaimed the women's technical duet world title in Doha on Monday.
The 27-year-old sisters first took the crown in Budapest in 2022 but just missed the podium in the discipline last year in Fukuoka, Japan.
They scored 266.0484 points. Britons Kate Shortman and Isabelle Thorpe took silver with 259.5601 and Spaniards Alisa Ozhogina and Iris Tio Casas repeated last year's bronze with 258.0333 pts.
Japan's Moe Higa and Mashiro Yasunaga, who were crowned champions in 2023, withdrew just before qualifying started, one of the two swimmers being unwell.