Introduction to the private collection: Chairman Mao’s badges and coins in the private collection are all from the private collection of Ms. Shen Yuehua of Xiangyang Village, Shanyang Town. Since the first Chairman Mao badge was collected in 1997, in the past 18 years, it has collected more than 10,000 various Chairman Mao badges made of more than 30 materials, of which more than 5,000 are on display in private collections.