The moral of Laozi's customs clearance map is Feng Shui.

Fan Ceng painted a lot of pictures of Laozi's going through customs, which shows that Laozi's going through customs is a big theme, and collectors like Laozi's going through customs best. In Fan Ceng's painting, Lao Tzu rode a green cow out of Hangu Pass. In the painting, an innocent young man holding the green cow with a smile all the time is in sharp contrast with the image of Lao Zi sitting on the green cow and thinking quietly. I wear a white robe, a purple robe or a gray robe, and the purple gas comes from the East. He can't draw purple gas on the painting. Chinese painting is more subtle, and it will show up if you wear a little on his clothes. This is the charm of Chinese painting! Fan Ceng used it, which is his ability and the embodiment of Chinese painting art!

According to historical records, Lao Zi went through Hangu Pass in the west, which means Hangu Pass in the west, so when Lao Zi didn't get to Hangu Pass, his position was in the east. According to the guidelines, readers stand in the west to see Lao Tzu coming, and they know that there are auspicious clouds and purple gas in the sky before they arrive! The ancestor of Taoism in China was born! And Fan Ceng is more successful in using historical themes! Laozi's Tao Te Ching is a mature philosophical work and the greatest philosophical thought in the late Eastern Zhou Dynasty! Later generations answered questions on the basis of Laozi's thought, because it formed a huge group, so it was called "Taoism"! Before Emperor Wu of the Han Dynasty, feudal rulers recognized Taoism and adopted Taoist thoughts to govern the country.