Purple Mountain Observatory
3556 Lixiaohua ("prov. designation": ) is a dark Lixiaohua asteroid from the outer region of the asteroid belt, approximately in diameter. It is the parent body of the Lixiaohua family. The asteroid was discovered on 30 October 1964, by astronomers at the Purple Mountain Observatory near Nanking, China. It was named after Chinese philanthropist Li Xiaohua.