The commonly used one is the eight-hole casket, which is relatively simple, or it can be said to be very simple. Now the common Tao Di in the market is improved from casket, but the former is pottery, and the latter is porcelain, so the price has doubled. The main producing area of casket is Xi 'an (generally with the word "Hanle Square" at the bottom), where you can buy it for five dollars and ten dollars on the street, and in other cities.