If you are a Chinese citizen, you don't have a problem to enter China as long as the passport does not expire yet (not need to have 6 month validity). But you need to renew your passport in China to return to US or Canada.
Reply
所有跟帖:
• Thanks anywayTeacher Eight! -HZ_IRONHEAD- ♂ (0 bytes) () 12/10/2019 postreply 12:23:11
• Teacher 8: I just applied eTA online this afternoon for tomorrow -HZ_IRONHEAD- ♂ (73 bytes) () 12/10/2019 postreply 12:53:32