If you want to do business in China, you have to comply with Chinese laws including those on speech. If you do not want to comply with those laws, you cannot do business in China. Both are fine and both are legal, but you cannot have it both ways at the same time.

You cannot flout the laws in China and continue to do business in China. This should also be reciprocal: Chinese companies should not be able to do business in the United States while flouting the laws of the United States.