Myth has it that these structures served both as road signs and as platforms for passersby to leave messages, emerging as early as the Yao and Shun era in the primitive society. At that time, people would set up a wooden pillar along key thoroughfares to identify routes and serve as landmarks. Later, post stations and relay stations also used these pillars for identification. They were known as "Huanmu" or "Biaomu," and later collectively referred to as "Huanmu." Since the ancient character "Huan" sounds similar to "Hua," it was gradually pronounced as "Hua," leading to the name "Huating" or "Huatingmu." On this wooden pillar, travelers could carve their opinions, hence another name, "Bangmu" or "Feibangmu." The term "fei" in ancient times meant discussing right and wrong, akin to modern-day feedback. Therefore, it also functioned as an early form of an "opinion box." According to historical records, during Yao's time, the Feibangmu were constructed with horizontal beams crossing the pillar...