It is said that Wu Zetian sent a minister to the local people in NSW week liuzu, orange gift, Minister returned to Beijing after the emperor taste. After Wu Zetian tasted the praise, it made Xinxing County pay tribute every year, and the name of the tribute citrus came from it. Because of the emperor's favorite fruit, the burgeoning citrus is also known as the emperor's citrus. The characteristics of emerging Gonggan is thin and crisp, light color, no less residue nucleus, sweet entrance smooth, it is very popular among the public.