Does anyone know anything about the harp?

That's not a harp, to be exact. That thing is called lira.

As early as ancient Greece, there was such a musical instrument, which was composed of a turtle's shell and a string of sheep intestines. Because of its convenience and lightness, it has become the favorite of wandering poets. Orpheus in Lyra is a player of Lira.

In the later period, the disadvantages of this instrument appeared-because the range and volume caused by the small speakers were not enough, it was gradually replaced by the long-string harp.

Ps: There are also several musical instruments of the same period, which are very similar to lira in classical paintings: Egyptian guitar (the predecessor of modern guitar), Ghitera, elegant.

At present, the best lira producer is the Viennese generation, which is not available in China. You can order it online. They will attach teaching materials.