Legislation that could eventually mandate a sale of TikTok is moving forward. But any kind of divestiture by its Chinese parent company, ByteDance, is likely to prove challenging.

The House on Wednesday approved the bill to ban TikTok unless ByteDance sells the app to a buyer the government signs off on. The bill would still need to pass the Senate and be signed into law by the president. Assuming that happens, however, the options for potential buyers would be extremely limited, a potential spinoff presents many difficulties, and the Chinese government or U.S. regulators could try to block any of those options.