Cai He District, Longjie. Kaifeng RTMART Supermarket, RT Mart is a supermarket brand founded by Runtai Group in Taiwan Province Province, China, 1997, which is managed by RT Mart Circulation Co., Ltd. According to the inquiry, a supermarket in official website and RT Mart, Kaifeng, learned that the supermarket belongs to Cai He District of Longjie. Kaifeng, formerly known as Bianzhou, Bianliang and Bianjing, is a prefecture-level city under the jurisdiction of Henan Province and one of the central cities in the central area of China Central Plains urban agglomeration approved by the State Council.