Germany's ambassador to China says she was summoned by Chinese authorities after four Germans were arrested on suspicion of spying for Beijing.

Chinese President Xi Jinping said the US and China should be "partners, not rivals," as a series of issues, including Chinese aid for Russia in its war against Ukraine, continue to separate the countries.

Earlier reports had suggested ByteDance planned to sell the app, without its powerful algorithm. Earlier this week, US President Biden signed a law that would effectively ban TikTok in the US if it is not sold.