Do I need a marriage certificate to open a room?

According to the law, a marriage certificate is actually required. If not, you need a marriage certificate. Men and women are not allowed to live together to open a house. But now there are hotels and inns everywhere, and no one cares. You can open a room as long as you have an ID card when you check in, and even some places don't need an ID card! I understand this truth, hehe! I hope it helps you!