[ Well, this is certainly the first time he has been asked it, but he also doesn't feel disinclined to answer. He Xuan himself does not do many greetings that are normal for others to perform because he is, quite frankly, rude.

But, that doesn't mean he has no knowledge of how they are done. ]

...Normally, people can bow. But, it's not a basic matter.

It can differ. Especially if the person you're greeting is of higher importance than you are; then it can be a deeper bow. Or something just like this—

[ He Xuan holds up one hand before having the fist of his other meeting it, then actually inclining his head in what is actually a respectful manner. ]

Self-explanatory.