Although Dong Min Garden hangs moxibustion for a little longer than Yin Yan, it is better than Yin Yan in strength. My friend went to Dong Min Garden for training before. When he came back, he complained to me that he didn't learn anything from the training. Then he went to Yin Yan for hanging moxibustion training, and now he has obtained the certificate of registered hanging moxibustion teacher.