Five times. According to the relevant materials, Guizhou Province can take the public compulsory subject examination for a total of 5 times, which is stipulated by the Department of Human Resources and Social Security of Guizhou Province, with a total of 5 examination opportunities. The public compulsory courses for professional and technical personnel in Guizhou Province are divided into three subjects: the establishment of credit system, the revitalization of rural areas and the construction of innovation ability. After each subject is completed and passed the examination, a certificate of conformity can be obtained.