Changzhou Sida Power Supply Co., Ltd. a subsidiary of Changzhou Huagao Industrial (Group) Co., Ltd. professionally makes and markets switching power supply, stereo set and related electronic products.

• 常州市思达电源有限公司是一家专业从事开关电源的研制、开发、生产和销售的有限责任公司，是中国电源学会会员单位。