Multimedia form. According to the query of Huayu Examination Network, Mr. Zhai introduced the composition, characteristics and functions of Huayu Examination Network through PPT, and showed the microscopic images of Huayu Examination Network. Teacher Zhai, that is, Zhai, is a lecturer in the EMBA presidential class of a well-known university, a management consultant for large enterprises, and a diagnostic expert in management magazines.