1. Before the opening hours of the system, the voluntary reporting systems of the college entrance examination in various provinces and cities, including the system for collecting voluntary reporting, are open regularly, and the non-voluntary reporting hours are closed.

2. The number of visits is too large, and the opening and closing time of the voluntary declaration system is the maximum time, which easily leads to the situation that the number of visits exceeds the system load and cannot be opened.

3, computer problems, computer network problems may lead to this problem.