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The five-day games, now in its second year, are a spectacle demonstrating China’s rapid progress in as the technology race with the U.S. heats up, with 51 events and more than 1,000 competitions taking place including running, table tennis and soccer.

The games, which are taking place in the ��ɫtv Speed Skating Oval built for the 2022 Winter Olympics, opened the same week as Beijing held the , where companies showcased around 3,000 products, including humanoid robots.

China the world's humanoid robots. The U.S. has stepped up scrutiny of robots from .

Last month, the U.S. Federal Communications Commission on imports of new foreign-made humanoid robots. The FCC cited national security reasons in a move that targeted China. The Pentagon recently also , one of China’s leading humanoid robot makers, to its list of companies that it deemed have ties with the Chinese military. Beijing has hit back at the accusations.

At Saturday’s opening of the robot games, the organizer and robot makers said that Chinese humanoid robots defeated human world records, as hundreds of humanoid robots marched in formation onto the field in a massive display of synchronized coordination.

At a 100-meter sprint, a humanoid robot achieved a result of 9.39 seconds, beating the human record of 9.58 seconds set by Jamaican athlete Bolt in 2009.

In a standing high jump, a humanoid robot was able to reach 2.88 meters, well above the 0.95 meters best result by a humanoid in last year’s . It surpassed the human high jump record of 2.45 meters set by Cuba’s Javier Sotomayor in 1993.

Both robots were from Beijing-based X-Humanoid.

Before the opening, a humanoid robot from Chinese smartphone company Honor completed a 100-meter sprint in a record of 9.32 seconds during a trial of the games, the company said, at a peak speed of 14.5 meters per second.

Still, humanoid robots are still mostly used for demonstrations, performances and research — at least for now — and it will still take time to achieve mass real-world deployment.

Some spectators at the robot games said they were excited about the humanoid robots’ quickly improving abilities.

Humanoid robots are “evolving rapidly,” said Li Yanfeng, an education worker and a Beijing resident.

“At first, I wasn’t very accepting of . I was even a bit resistant to it, because of the possibility that it might replace or displace humans,” she said. “But now that I see this development is unstoppable, I decided to come and take a look.”

“These sports are perfectly normal for humans, but now robots can do them. I find it amazing,” said Yang Shangzheng, another spectator.

Liu Tao, who was watching the games with his son, said that he was hoping to see “the best robots China currently has to offer.”

This year’s robot games — which the organizer said has 16 countries participating, among them Germany, Japan and the U.S. — also include other events such as weightlifting and tug of war.

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Chan Ho-him reported from Hong Kong. Olivia Zhang and Liu Zheng contributed to this report from Beijing.