The signature of Dunhuang 694dq can be bought in a musical instrument store. According to the relevant public information, the market price of 694DQ autographed money is about 2200, and the mid-range Zheng of Dunhuang Guzheng is better. You can buy it in a musical instrument store, and the market price is translucent. When buying Dunhuang guzheng, you must pay attention to fakes. You can go to Dunhuang Guzheng official website to find a local agent.