What does Venus mean in the perpetual calendar?

The "Venus" and "Du Ji" you mentioned belong to the stars in the nine planets. The nine planets are the sun, the moon, Venus, Jupiter, Mars, Saturn, Jupiter and Lodz. In ancient times, choosing a home and a star matched people's age to infer good or bad luck. The nine planets here are also called Jiuyao. These are the nine planets in the Indian calendar. In the Brahma calendar, nine obsidians are used to match a day to determine the good luck or bad luck of a day. This calendar was introduced into China during the Kaiyuan period of the Tang Dynasty. Japanese law in nine planets was once popular in China. Later, China's selectors and astrologers modified this method, using the ages of the nine planets to infer people's fate. Mark the calendar.

Good luck.