Can I apply for an international patent for appearance?

1. There is no "international patent". Patents are independently authorized by each country (the only exception is the European Patent Office in Europe), so there are only China patents, Japanese patents, American patents and so on.

Maybe you mean to apply for a foreign patent. Of course, the appearance is ok. Those with domestic priority may apply to other countries or organizations that have acceded to the Paris Convention within 6 months from the date of China's application.