Yang explained why he worked with Song Yadong at 25-30 percent of capacity

"We had three weeks there anyway, and we did everything we could: and physiotherapy did, injections were put in, pain relief, all kinds of ointments, pills all the time. I put a lot of effort into pain relief as much as possible. I was worried that I was limited in actions. For example, we spent the whole camp working very hard with rubber bands. Kicking, kicking, wrestling. It's just that at one point I can't kick, I can't wrestle. All these strong aspects that we've been sharpening, I have to eliminate them. I've got to stay on my feet, I've got to remember the work of boxing, I've got to not stagnate, I've got to work the distance in order to keep me on my feet. It turns out, I worked out at 25-30 percent of my capabilities."