Sias. The graduation certificate issued by Zhengzhou Sias College is Sias', not Zheng Da's. College is a joint college in Zheng Da, which has been recognized by the society after graduation. Zhengzhou Sias College is located in xinzheng city, Zhengzhou City, Henan Province. It is a full-time private undergraduate college approved by the Ministry of Education to implement higher education, a full-time undergraduate college approved by the the State Council Academic Degrees Committee to implement overseas bachelor's degree education cooperation projects, and a qualified Chinese-foreign cooperative school evaluated by the Ministry of Education of China.