The original meaning of 1 and Xu is that the sun just came out, so it can also be extended to the meaning of light.
2, Xu, the appearance of the day. -"Shuo Wen" was written at sunrise. -Poems, Hurricanes and Bitter Leaves was written by Xu Xu. -"Tai Xuan Cong". Note: "Unknown." The height is high and the height is short, and the east is getting white. -Tao Jin Qian's Return to the Garden.
Expanding knowledge: Xu Can is a caste, and its surnames are distributed in Xiaoshan, Zhejiang, Gaochun, Jiangsu, Qinzhou, Guangxi, Puyin, Hubei and Chishui, Guizhou.