There are two situations: 1, see 1 item C, which makes it impossible for most prisoners in the prison to carry out the determined itinerary. 2. Prisoners' classes are not limited to classrooms. Only some basic education courses, such as "general education qualification", can be taught in the classroom. Others should attend classes in the corresponding places, such as "carpentry apprentices" going to workshops, "kitchen safety and hygiene" going to kitchen restaurants, and laundry rooms do not need training. Therefore, sometimes it is normal not to see students in church.