# 12 Shichen(Shichen is a two-hour period)</p><p></p><p>## Background</p><p>The Chinese ancients observed the sun during the day and the stars at night, dividing the day into twelve periods on average, and dividing the sky dome into twelve directions centered on the North Star.</p><p>In the Han Dynasty, it was named as Midnight, Chicken Singing, Pingdan, Sunrise, Eclipse Time, Suizhong, Sunzhong, Sunrise, Sunrise, Sunrise, Dusk, and Rending. It is also expressed in terms of the twelve 地支, 子,丑, 寅, 卯, 辰, 巳, 午, 未, 申, 酉, 戌, 亥,and it is said that when the night is twenty-three to one o'clock, when one to three o'clock is 丑, and three to five o'clock is 寅, and so on</p>
0.4 Add new font style thanks to RStudio</p><p>0.3 Add some scales and format time text</p><p>0.1 The first release
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