Twice. Official website, School of Computer and Electronic Information, Guangxi University, shows that if a school or college fails to pass the unified defense, there may be another opportunity to postpone the defense, which can be said to be two opportunities. College of Computer and Electronic Information of Guangxi University was established in April 1997. It is formed by the merger of computer science department and electronic engineering department of physics department of Guangxi University. 1March, 1999, the school computing center was merged into the School of Computer and Information Engineering.