What's the name of the ancient time-keeping method in China?

There are years, months, days and hours, which are calendars. There are heavenly stems and earthly branches, 12 hour, 24 solar terms, 12 zodiac, five lines of gossip and other methods.

Please refer to the following:

In the ancient calendar of China, A, B, C, D, E, Ji, G, Xin, Ren and Gui were called "ten heavenly stems", while Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai were called "twelve earthly branches".

Scale leakage is a special type of leakage. Time is measured by weighing the weight change of water flowing into the receiving pot with a porcelain scale. It was invented by Li Lan, a Taoist priest of the Northern Wei Dynasty in the 5th century A.D., and can be used for regular alchemy. It belongs to a civil timer. Because of its simple production and sensitive timing, it spread quickly. Because the leak box, thirsty birds, copper basin and white rabbit form a stable water supply system, improving the sensitivity of China scale can get more accurate time. According to Sui Shu Tian Wen Zhi, in the early years of Sui Daye, Yang Di ordered Geng Xu and Yuwen Kai to "weigh the leakage according to the method used by Li Lan, a Taoist priest in the post-Wei Dynasty, to make up the line." Since then, the improved scale has become a royal timer and has been adopted by celestial authorities. From Sui and Tang Dynasties to Northern Song Dynasty, it has been the main astronomical timer.