Kang is her daughter and teaches guzheng in Huaxia Art School. She plays the guzheng very well and has been teaching it for many years. If you are willing to pay more, she can give you a small lesson.
That hill in Tangshan is the area where you buy ancient costumes or perform costumes or musical instruments. There are many instruments to teach guzheng ~
There is a tall building on Xishan Road, where there is a Bowen (it seems to be the name) art school with guzheng and other musical instruments, but the fees are relatively expensive.
Philharmonic, who also teaches guzheng, doesn't know the price.
The rest of the places that sell national musical instruments have related teachers, but they don't know their level. The above recommendations are all better ~