From 37 BC to 668 AD, in the southern part of the northeastern region of my country, there was an ancient northeastern country, Goguryeo, founded by the Fuyu people. At that time, it was from the end of the Western Han Dynasty to the beginning of the Tang Dynasty in China. The Xuanqin was a plucked stringed musical instrument played by the Goguryeo people of the ancient northeastern minority in...