Look for a book published in Japan about the 10 best underground fighters in Japan. When it was done they added another chapter just for him. From what I heard he's beaten most of them.
I appreciate your desire to learn and get better from being around better fighters than yourself. From what I know about Mr. Su, he would appreciate that very much himself. He's been doing that very thing for probably 40 years as opposed to 4 years of high school wrestling. His teachers were among the best in China, Taiwan and Japan. He made a point of seeking the best teachers in the world and putting his ass on the line in underground fights, the likes of which you can only imagine.
I am not defending this guy because he is my teacher or anything like that. He's not. I have met him and felt first hand his ability. I have a huge amount of respect for him or anyone of that skill level. If you can't see it, I'm sure he'd be glad to show you. He's very approachable and loves to have fun.
I'm pretty sure he has some fight video's you can purchase. Some training video's too. I don't own them. But even than, I doubt you'll understand unless you feel it for yourself. That's what I do if I find someone like him. I try them out and beg for punishment. Than you know the truth. All the rest of this chatter is speculation based on your own experience. When you get close to 40 years, let me know.
;)