Ltd. is a professional manufacturer specializing in R & D, production and sales of audio-visual equipment, professional audio and automotive electronics. The company formerly known as the Huadu District, Huadu District, the YEEREE company, was founded in 2006. It has two brands of "billion" and "foreign market" for the domestic market, and its series of digital display stands, central control systems, multimedia integrated machines, teaching and conferences dedicated amplifiers and speakers, automotive dedicated amplifiers, KTV professional voice. Sound equipment and conference system products have excellent performance-price ratio in the industry, and are well received by domestic and foreign customers. In 2012, a large number of products were exported to European and American markets. After 2012, domestic education industry and public broadcasting industry were vigorously promoted.