Jiangyin Huayun Erhu Art Training Center. Jiangyin Huayun Erhu Art Training Center is located in Huannan Road, Jiangyin City, Wuxi City, Jiangsu Province. It has a special erhu teaching class for middle-aged people, which is very professional. Erhu is one of the most representative national musical instruments in China, and it is also the most popular musical instrument among bowstring instruments.