The host nation had already collected five golds at the Yingdong Natatorium in the Olympic Sports Centre.

But Uzbekistan rounded off the competition by winning the highlight routine.

So China took seven gold medals, while Uzbekistan took two titles and Slovakia one during the three-day competition.

The Jiang twin sisters, Wenwen and Tingting, imitated the swans in the water and showed their power and beauty of legs in the duets free routine, winning with 92.8000 points.

"Our legs were shaky after the free routine which is much difficult than the technical routine," said Wenwen.

"We are planning to compete all the stops of the FINA World Series and challenge our strength limit."

Tingting added: "As 32-year-old women, the strength is the most challenging part for us.

"But at the same time, we enjoy the process of improving from each competition."

Austrian sisters Anna-Maria and Eirini Alexandri took the silver medals with 86.8000 points and Anita Alvarez and Ruby Remati of the United States came third with 82.9667.

"We are triplets in fact, and two of us compete here in Beijing while our bigger sister did not come this time," said 20-year-old Anna-Maria Alexandri.

"All of us like artistic swimming and because we are good at this, we moved to Austria in 2013 - we are Greek in fact.

"We have competed in Italy, China and will go to Japan, Hungary and Canada for the next legs of the World Series this year.

"Our goal of 2018 is to compete in the European Championships in Glasgow in August."

Chinese 16-year-old pair Shi Haoyu and Zhang Yihao celebrated their second title in the mixed duets free routine with 77.8667 points, having won the technical routine of the same event the day before.

"We are preparing for the World Junior Artistic Swimming Championships to be held in Budapest this summer," Shi Haoyu said.

"We need to compete as many events as possible to get more experiences."

Uzbekistan took the last gold medal on offer in the highlight for a total of 79.1333 points and Slovakia finished second 76.5000.

Beijing was the second leg of the FINA Artistic Swimming World Series 2018, the second edition of the newest FINA event that integrates recognised artistic swimming competitions around the globe and establishes an international ranking based on points accumulated over a ten-meet circuit.

The next leg is due to start in Tokyo on Friday (April 27).