Chang Geng Xing is Taibai Xing. There is an old saying: work at sunrise, and rest at the age of ten. Taibai Star, commonly known as Seven Stars, is the brightest star before the sun comes out, indicating that the sun is coming out soon.
Taibai Venus only appeared in novels of Ming and Qing Dynasties, and most of them gave him the name of Li Changgeng, which was purely perfunctory from the traditional astrology. In ancient times, the standard name of Venus among the five major planets was "Taibai", which belonged to the west in the traditional stars, while the west was gold in the five elements. Therefore, it was not until the Ming Dynasty that the name of Venus officially appeared. It was called Chang Gung because Venus had an ancient name "Chang Gung". This is because Venus appeared in the western sky every year in the dark. Li's surname may be the cause of Li Bai, or it may be attached to Lao Zi's surname. It's hard to say. In a word, Li Changgeng, the white Venus, is probably the way it is.