Mulan debuted in China this weekend to very lacklustre results, likely to land around low $20Ms,and probably finish around $50M. That's not good for a $200M budgeted film that was made with expectation of decent performance there. Especially as the Chinese market is the most robust market these days.
Part can be blamed on piracy, as the digital release for the rest of the world meant that high quality torrents were widely available, but, generally, it doesn't look like its a movie that Chinese audiences wanted. Best explanation that I've seen is that audiences there have access to a robust film industry, and they're not looking for Hollywood to tell versions of there stories. If they want to watch a Hollywood film, they'll choose an over the top action movie like the MCU, Fast and Furious or transformers.