Chinese law requires that any and every Chinese company default to the demands of the Chinese government. That means that any data these companies collect about users of their services can end up in a Chinese government intelligence data base. That includes usernames and passwords that may be used in other programs or which can be used to discover similar identities and passwords that those users have in their occupations or financial accounts. I don't trust the Chinese government any more than I trust the current Republican administration in this country.