英语翻译
A Company is hereby authorized to the brand under B Company in China’s regional operator,assumes all production,marketing and sales ot the brand.Hereby commissioned.
中文是：授权A公司为B公司旗下品牌的中国区域全权运营商。特此授权。
我想改成 B Company has hereby authorized A Company to act as operator of the brand in Chinese mainland.如何？