The reasons are as follows: "Song Huizong Qianlong Imperial Guqin will be auctioned" reported that: ... During the Qianlong period, 107 Guqin was hidden in Yuanmingyuan, with the serial number. The guqin to be unveiled this time is the' Top 22'. At present, there are 23 guqin hidden in the Forbidden City, and only the box is left.