2 、靠板边边有个卡扣的是朝外面（如图）
③、后靠板两边卡扣对好底座包后面的卡扣，往下按到合适位置（如图）
朝外
② The back board side with a buckle faces outward.
③ Align the buckles on both sides of the backrest plate with the
buckles on the back of the seat cushion, and press down to the
appropriate position.
Face outward
