The horse ranks the seventh among the twelve animals in Chinese zodiac. It is associated with Wu in the Twelve Earthly Branches and the hours from 11:00 am to 1:00 pm. At the noon, Yangqi (positive energy) has reached its mount, and Yinqi (negative energy) is beginning to accumulate. At this time, the alternation of Yin and Yang makes most animals lie down and nap, while only horse stands. Therefore it is also referred to as "Horse of Wu".