Take a bus to Luojiashan Station, enter the front of the Information Department, go straight along the road, turn left in the second student canteen, and go straight to the Information Department Stadium. The blue building next to it is the brothel of the information department. The buildings in the brothel are connected together, and the entrance in the middle is "Yi Jiao", which is what you said. Of course, the faster way is to take a bus to Guangbutun Station and enter Wuda University. The blue building is right at the door, just walk in ~