Are Shanghai Bull and Ningbo Bull a family?

This is a Bull Group with 14 subsidiaries, namely: Ningbo Bull Electric Appliance Co., Ltd., Ningbo Bull Precision Manufacturing Co., Ltd., Cixi Bull Electric Appliance Co., Ltd., Shanghai Bull Electric Appliance Co., Ltd., Ningbo Bull Marketing Co., Ltd., Ningbo Banmen Electric Appliance Co., Ltd., Ningbo Bull Optoelectronic Technology Co., Ltd., Ningbo Bull Digital Technology Co., Ltd., Ningbo Luo Xing Trading Co., Ltd., Ningbo Bull Electric Sales Co., Ltd., and Bull.