Fujian had managed a 4-1 start in the third set but Jiangsu quickly overtook the lead and extended it to 15-10.
The result leaves Leeds with six points from three games, while Sheffield are still looking for their first point of the season.
Rennes, who finished third in the curtailed 2019-20 season, is set to make its maiden appearance in the Champions League group stage this season.
Brazil's Gremio also secured their place in the tournament's next phase on Tuesday, with a 2-0 home win over Chilean side Universidad Catolica. Pepe and Antonio Rodrigues were on the scoresheet for the Porto Alegre outfit.
Last-placed Dijon was closed to clinching its first win of the news season, but an injury-time penalty from Teji Savanier crashed their hopes as the team was held to a 2-2 draw at home against Montpellier. Enditem
The defeat again highlights doubts about Manchester City's defense as they were taken apart by Leicester even though Riyad Mahrez put Guardiola's men ahead in just the fourth minute.
The 41-year-old coach was in charge of Bundesliga outfit Augsburg from December 2016 to April 2019, before coaching Germany's U-20 and U-18 national teams.
The Spaniard has won 94 matches at Roland Garros and if he can make it all the way to the final this year, there is a chance for him to equal old rival Roger Federer's record of 20 major titles in his remarkable 100th win at the clay Grand Slam.
Attracting around 300 of China's top swimmers, the 2020 Championships are being held from September 26 to October 2 in Qingdao.
You Hao of Jiangsu competes during the men's rings final at the 2020 Chinese National Artistic Gymnastics Championships in Zhaoqing, south China's Guangdong Province, Sept. 27, 2020. (Xinhua/Cheng Min)
ACCRA, Oct.1 (Xinhua) -- Seven Ghanaian teenage footballers who died in a road traffic accident on September 19 were laid to rest on Thursday.