I stayed in a hotel in Beijing without my ID card.

1. First of all, if you don't have a foreign ID card or don't have your ID card with you, you can contact your friend to use his ID card to open a room for you. Go live in it. 2. Also, if you didn't bring your ID card and didn't drive here, you can have other documents. At least you can prove that you have an ID card, which is better than nothing. 3. If all the above methods fail, there is no other way but to find the police station and issue the household registration certificate. Tell the police station that you don't have an ID card but want to stay in this area. They will give you a certificate to stay, but it's a bit troublesome.