Useful. According to official website of Xi Jiaotong University, the diploma of Shaanxi Vocational and Technical College of Communications is recognized by the state, and Shaanxi Vocational and Technical College of Communications is a national public school, so the diploma is useful. Xi Jiaotong University, referred to as "Xi Jiaotong University", is located in Xi, Shaanxi Province. It is a comprehensive research-oriented national key university directly under the Ministry of Education of People's Republic of China (PRC). Jointly established by the Ministry of Education, Shaanxi Province and the National Bureau of Science, Technology and Industry for National Defense, it is a national "double-class" university.