- Yifeng Musical Instrument Co., Ltd
- Address:No.166 Xinshi Middle Road, Shijiazhuang, Hebei, China
- Inneo Musical.co, Ltd
- Address:20F,Galaxy Building, No.33 South Main Street,
- China Options Co., Ltd
- Address:U.1208, Hongmian BLD,No.10 Hualei Road
- SKY MUSIC INSTRUMENT MANUFACTURE LTD
- Address:Baiyun Road .Baiyun Direct .Guangzhou.China