1. If you have a problem with teaching and ask for a refund, but you don't have it;
2, neighbors (affecting people's normal life);
3. competitors.
Many people who do this kind of training usually start first and make up for problems later. As the saying goes, the enemy will block the water and have means to cover it. I suggest that if it is large-scale, try to operate legally. This is a long-term solution.
If you don't want to register, there are several methods for reference only:
1. Talk about cooperation with existing training courses, give a certain management fee and use the other brand;
2. Find qualified related product suppliers to cooperate in development, and they will also consider it, because you can help them sell the corresponding products here.