China University of Mining and Technology Xu Hai College graduation certificate. According to Sohu News, the graduation certificate of Xu Hai College of University of Mining and Technology is called the graduation certificate of Xu Hai College of China University of Mining and Technology, which is the official proof of the school's academic qualifications. China University of Mining and Technology, located in Xuzhou City, Jiangsu Province, is a national key university directly under the Ministry of Education.