If your economy allows, you can buy another box of moisturizing cream for wooden instruments. It's only over 2.
I don't advocate going to a musical instrument store to buy corresponding appliances. If your friend has played very well, she must have her own familiar nails, music scores, music stands and so on, so there is no need to send them again. If you are interested, you can take her to order a pair of nails suitable for her fingers, which will cost about 1 yuan. It's ok to send 1 string to 15 strings, there's no need to send a whole pair, because I've been playing the piano for 9 years and I haven't changed 15 strings to 21 strings.
OK ~ Make up your mind. Guzheng is my major. Believe me ~ ~ * *