Flying kites is an activity favored by many Chinese during Tomb-Sweeping Day. Kites are not only flown during the day time but also in the evening. Little lanterns are tied to the kite or to the kitestring. And when the kites are flying in the sky, the lanterns look like twinkling stars at night. What makes flying kites during this day special is that people cut the string while the kite is in the sky to let it fly free. It is said this brings good luck and that diseases can be chased away by doing this.
Source: China Daily