2. Geng, pinyin: gēng, is a first-class Chinese character (commonly used word) in the General Specification of Chinese, which first appeared in the bronze inscriptions of Shang Dynasty. The original meaning of "Geng" is not seen in the literature, which is quite controversial.
3. As early as in Oracle Bone Inscriptions, Geng had been working for seven days. The ancients matched stems and branches with the five elements, five sides, five flavors and five permanents, so Geng was given the meaning of "gold" and "righteousness". The summer solstice of the lunar calendar is three nights and three volts, so "Geng" has become another name for "Futian". In addition, "Geng" also has the meanings of road, truth, age, replacement and repayment. Doubt is false.