Chinese cities are densely populated and a lot of people live in pigeonholes in high-rise apartment buildings. Usually, over 100 households share a couple of elevators or the same flight of stairs.
中国城市的人口密度大、空间小，多数市民住在空间不大的高楼里，上百户的人共用一两部电梯或一道楼梯。
2
Wishing light are on the rise, that of the flying, cannot the long time not put, and the Flight not to be append the FOREIGN BODY.
许愿灯有上升力时即该放飞，不可长时间不放，放飞时许愿灯下不可悬挂异物。
3
The remote control helicopter of the utility model has the advantages of stable rise, fall and flight and strong impact resistance performance.