China's Unitree unveiled a new high-speed robot it dubbed "Superman" on Monday, days before becoming the first general-purpose robotics company to list on mainland China's stock market.

Unitree , the world's biggest humanoid-robot maker by sales, will start trading in Shanghai on Wednesday after raising 6.1 billion yuan ($905 million) in an initial public offering last week.

The company, based ⁠in the eastern Chinese tech hub of........

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