I visited China for the first time with two sims. One learned martial arts very quickly (she has the disciplined trait) and reached lv 10 while still in China. So I tried to spar with another sim, but I couldn't. The option wasn't listed and I was sure the other sim could do it because he had a blue belt. So I thought: "Maybe I need to make a phone call to participate in the championship." So I called someone, but I could not spar with him too, though I called him so I know he has at least a few levels in the martial arts skill. Any help?