Can China UnionPay Express use salt in Mengcun, Cangzhou?

Can China UnionPay Express be used in Bai Yan Supermarket in Mengcun, Cangzhou? I can't. According to the resume of Bai Yan Supermarket, Bai Yan Supermarket is a small supermarket, and only large and medium-sized supermarkets can use China UnionPay Express Payment. Therefore, China UnionPay Express cannot be used in Bai Yan Supermarket in Mengcun, Cangzhou. Cangzhou is a prefecture-level city under the jurisdiction of Hebei Province, located in the Heilonggang River Basin in the southeast of Hebei Province and the east of Hebei Plain.