Roxas is kind of unsure about China, mostly because he approached him while he wasn't exactly himself (he was way closer to the part of him that is Sora than he wanted to be and it kind of freaked him out). At the same time, since he initiated a relationship, he doesn't really want to drop it. China strikes him as nice and knowledgeable, and he likes being able to share experiences since they've both been in Johto for a while.