1, rarity: Shao Quan's printing pot quantity is small, the market supply is limited, and it is valuable.

2. Artistic value: Shao Quanyin's pot works are famous for their exquisite craftsmanship and unique modeling style. They have high artistic value and appreciation value, and are favored by collectors, so they are valuable.

3. Historical value: Shao Quanlin's pot works have a long history, spanning many historical periods, and the historical materials are of high value, so they are valuable.

4. Quality and material: Shao Quanyin's pot works are made of high-quality purple sand with exquisite craftsmanship, which makes these works have high quality and material, so they are valuable.