Master Sun is phenomenal. I was introduced to him by his student in the videos Chungling Li. Master Sun has received an award by the Chinese Government for being a Cultural Treasure . Master Sun was recognized because of his skill ,lineage and what he has done for the art as a coach. Many of his students are high level competitors. He is 79 in the videos and still moves well. He told me some amazing things. He has a new book out with DVD that was translated from his original book in Chinese with some additional information on Nei Gong and a letter written by Cheng Ting Hua you can get it at Plumb Publications. I will be going to Singapore to train with Chungling Li in November.