This is not a public welfare banner, but a real public welfare. Teachers don't charge money and don't sell CDs. It's just that some volunteers may charge a fee for sending CDs themselves, and at most they will pay a few dollars for postage. But no matter how good a teacher is, it is inevitable that others will take the opportunity to sell money, just as genuine copies cannot avoid piracy. Anyone who has really seen BBS CDs knows that both Chen Dahui and BBS teachers have specifically stated that they should not sell CDs and should not be deceived. If you don't listen, you shouldn't blame the teacher, but you don't listen. No matter what attitude you take, you must read it first before you have reason to express your opinions. I personally experienced my own practice and changed my destiny. This is the best proof. Grateful ancestors, grateful to Mr. Chen, grateful to all those who have paid. Thank you too. I wish you a happy new year and all the best.