Reference for VUC Piano Master Key Card Format Specification
The "Qin Master Key" is obtained by the qin maker in the background and made into a small card, which is delivered to the qin owner along with the instrument.
The qin maker obtains the "piano master key" through "My Studio ->My VUC".
The front of the card contains the VUC code and the "Qin Master Key". The back of the card is marked with the VUC query website.
Material: Maple wood residue used to make side panels.
Size: 55x35mm (length x width)
Information can be recorded by handwriting or printing.
