Where is the lobby office in Block B of Beishan Hotel?

The lobby office of Block B of Beishan Hotel is on the first floor of Block B of Beishan Hotel. The lobby office of Building B of Beishan Hotel is the place where the dark army breaks through. The mountainous area in the north is very large. After the North Hotel enters Building B, turn a door on the stairs on the first floor to enter a big office. So the lobby office of Block B of Beishan Hotel is on the first floor of Block B of Beishan Hotel.