1, the background of the intelligent vocational education system is not updated or there is a fault in the background, resulting in the brush not turning green.

2. There is a virus or loophole in the intelligent vocational education platform, which causes the information to be tampered with and will not turn green after the screen is swiped. Smart vocational education refers to the national intellectual platform for vocational education established, operated and maintained by Higher Education Press, and it is one of the columns of the national intellectual public service platform. The platform includes three modules: professional resource database, online quality courses and video open classes.