Yes, there are two places and two ways to spend the night at Tianfu Airport.
The first way: Chengdu Tianfu International Airport has a mixed-flow design for domestic departures and arrivals. If you don’t have checked luggage, you can theoretically not leave the boarding area. The advantage of this is that you no longer need to go through the security check again the next day.
If you have checked baggage you need to pick it up.
The second way: The quarantine area of ??Tianfu Airport will not be cleared overnight. You can walk from the baggage carousel exit to the arrival hall outside the quarantine area. There are a considerable number of seats in the hall where you can rest.
You can also go up the stairs to the departure floor next to the airline check-in area, where there are also some seats for passengers to rest.