Two working days. It takes two working days for Yiya Dental Clinic to refund the money, so that the money can be refunded to the account. Hubei Yiya Medical Investment Management Co., Ltd. (referred to as Yiya Dental) was established in 2003 and originated in Enshi, Hubei Province. It is a dental medical group led by Yan Feng, the American Gide planter and the planter of Linda University in Rome, USA.