What floor is China Customs in Terminal 3 of Beijing Capital International Airport?

China Customs in Terminal 3 of Beijing Capital International Airport is on the first floor. According to relevant public information, the "China Customs" in Terminal 3 of Beijing Capital International Airport is on the first floor, that is, the arrival floor. After the arrival of international flights, passengers need to go through border inspection and customs formalities on the first floor of Terminal 3 before entering the departure hall or transit area of the airport.