1. Yayuan has only two funds put into the market, one is called "Yayuan" and the other is called "Garden".

2. Less than 20 "Yayuan" models are put on the market every year, and less than 50 "Garden" models are put on the market every year.

3. Every product sold in Yayuan, whether it is a collection, a work or a commodity, will be accompanied by a certificate card of Yayuan with its own number and two photos, one for raw materials and the other for finished products. And the certificate and the photo will have old ni's autograph on the back.