The U.S.-China rivalry is shifting into new and unpredictable areas, engulfing everything from a popular video app to Hong Kong’s status as a global financial hub.

The latest tensions are overshadowing a trade agreement in January that was meant to draw a line under the trade war and be a boon for business. Instead, differences between both powers are deepening right at a time when the world economy is facing its worst crisis since the Great Depression.

This week alone, U.S. President Donald Trump said he is considering banning ByteDance Ltd.’s short video app TikTok as retaliation against China over its handling of the coronavirus. Some of his top advisers want the U.S. to undermine the Hong Kong dollar’s peg to the greenback to punish China for recent moves to chip away at the former British colony’s political freedoms. There are even concerns over the visa status of hundreds of thousands of Chinese students who enroll at U.S. colleges and universities each year.