Doesn't Jiayuan Biotechnology (Dongguan) Co., Ltd. have a phone number for its mask certificate?

Jiayuan Biotechnology (Dongguan) Co., Ltd. has no telephone number for the mask certificate. According to the relevant public information, the information of the non-medical mask certificate should be complete, including: product name, specification, implementation standard, production batch, production date, shelf life, ingredients and materials, manufacturer, production address, quality inspection seal, etc. There is no telephone number on the certificate.