No change. Dunhuang trademarks use color-changing printing. The paper has a strong texture and has an obvious concave and convex feeling when touched. Moreover, in the pattern of the trademark, the fairy is holding a pipa. If you look closely, the fairy's face has facial features.

Dunhuang guzheng is produced in Shanghai National Musical Instrument No. 1 Factory. Shanghai National Musical Instrument No. 1 Factory is currently the national musical instrument manufacturer with the largest production scale and the strongest technology and comprehensive strength in my country. The company has many of the country's most famous musical instrument-making masters. Among the more than 400 people in the factory, middle- and senior-level workers account for nearly 20%. Hainan National Instruments Factory No. 1 mainly produces more than 20 varieties of guzhengs, with an annual production of 20,000 guzhengs.