Sui Lu of China competes on the balance beam during women's apparatus final at the Artistic Gymnastics World Championships in Tokyo Oct 16, 2011. [Photo/Agencies]

TOKYO - China on Sunday won the titles of the balance beam and horizontal bar, bringing its gold medal total to four to top the medal tally of the gymnastics world championships in Tokyo.

Sui Lu, 19, delivered a flawless routine on the beam, scoring 15.866 with a difficulty of 6.600 and execution of 9.266. Yao Jinnan, also from China, took the silver medal with 15.233.

Sui also added a floor silver medal to team China, losing by a marginal 0.067 to Russia's Kseniia Afanaseva, who was the last to deliver her routine on the floor.

"I am very happy to win my first world champion," said Sui. "I had a chance to win my second today, and I was a bit disappointed to see the Russian gymnast's score was a tad higher than mine."

"But it's also good that I didn't win two golds at the same time, so that I can set a new goal to achieve in the future," she added.

Beijing Olympic champion Zou Kai won China's fourth gold medal with a clean performance on the horizontal bar. China has won the title of the event three times in a row.

Zou notched 16.441 points, outscoring his teammate Zhang Chenglong, defending world champion, who scored 16.366 and took the silver medal. Japan's top ace Kohei Uchimura, three-time all-around world champion, ranked third at 16.333.

"I increased the routine's difficulty and did very well today," Zou said. "I think we won because we usually make less errors than our competitors."

Danell Leyva of the United States captured the title of parallel bars, outscoring Vasileios Osolakidis of Greece and Zhang Chenglong of China.

Leyva, 20, notched 15.633 points in a clean routine on the bars, Osolakidis and Zhang both scored 15.533. Defending world champion Feng Zhe from China, who ranked first in the qualification, erred and ranked only seventh.

Yang Hak-Seon of South Korea won the men's vault gold medal, the first title for the country in this year's gymnastics world championships.

Yang, whose combined difficulty is the highest among all gymnasts, scored an average 16.566 points in two solid vaults. Anton Golotsutskov from Russia and Makoto Okiguchi from Japan ranked second and third, earning 16.366 and 16.291 respectively.

China has won a total of four golds, five silvers and three bronze medals in the championships. The United States and Russia chased behind China on the tally with seven and six medals respectively.

China's Zou Kai competes on the men's horizontal bar during the apparatus final at the Artistic Gymnastics World Championships in Tokyo Oct 16, 2011. [Photo/Agencies]