When they come home from their big day out with the magnet therapy and the jealous lunch, Shao Fei goes into the kitchen and grabs the bottle of Coke out of the fridge, shoves the car keys at Tang Yi and then storms upstairs alone. So his bedroom, as far as I can tell, is upstairs in canon. Unless he was going to take point on the balcony with his Coke and have a good pout, lol.

BUT THEN. When Tang Yi grabs him by the hand and pulls him away to massage ointment into his bruises, he pulls him in a direction that's not back toward the stairs. BUT. He could have just been dragging him to the ointment and then dragged him upstairs, lol.