In ancient China, business cards were called worship posts or famous posts. In the past, invitations issued by Cambodians out of respect when visiting others were called worship invitations. Famous posts, which began in the Han Dynasty, originally used flat wooden strips to write names and residences. It was called "Yi" in the Han Dynasty and "Sting" at the end of the Han Dynasty. Later, wooden business cards were changed into paper, which was called "name paper". In the Six Dynasties, it was called "Ming" for short, and in the Tang Dynasty it was called "door-shaped". Song dynasty was also called "hand stab" and "door stab". During the Ming and Qing Dynasties, it was called "Inch Chu" and "Red Single". According to Zhao Yi's research in the Qing Dynasty, there was no paper in the Western Han Dynasty, so bamboo was cut into thorns, and the book was named "Ming Thorn". Later, people embroidered the words "business card" on the brocade with red wool. There are many kinds of post-worship or famous posts according to the identities and occasions of the worshippers. Visitors should sign their names after the worship or the name card according to their relationship with the interviewee.