A hand-swing type shilly-car includes a main frame module and a hand-swing module. In accordance with the present invention, the forming of the floating gate does not require an additional photolithography step. The clip includes an axis pivotably mounted on to a bottom of the fan duct, a locking portion extending from an end of the axis and buckled with the fan duct, and a pressing portion bent from the axis and engaging with a bottom surface of the top plate of the fan. If properties of one or more objects have changed based upon the comparison, the delta between the object’s states is determined and this information is used by a fragment encoding module if the fragment has not been encoded before. This information is then relayed to a control system.