How to find target customers when doing business management consulting?

Enterprise management training itself should have a certain customer base, and in this case, it seems that ordinary companies will focus on telemarketing! However, this kind of hang-up is the most common, so I suggest that if the landlord does business management training, he can let the customer do a free training audition first, and after winning the favor of the customer, the work will be easy. I saw a lot of business management training on the Internet. Which company is the landlord from? China Training Network? Or yingsheng enterprise management? I think these two are quite popular now, and after listening to some free videos, I feel that they are ok.