When installing the black pendulum, be sure to ensure that there is no friction between the pendulum and the movement plywood, and that the pendulum and the movement's own pendulum remain parallel. The holes and hooks on the pendulum and the holes and hooks on the swing rod must be connected. When installing the watch hands, be sure to install the hour hand first and press it firmly before installing the minute hand. There should be no friction between the hour hand and the minute hand. When winding with a key, be careful to use gentle force and do not use sudden force, which may easily cause the spring to break.