The first response anyone will get from Wen Ning under these circumstances is a harsh glare, but he doesn't actually have the anger to back it up, so the look withers fairly quickly into tired annoyance. He keeps his arms crossed in front of him, blocking the flute from harm or theft.

"Just..." He sighs, taking a step to the side to allow the other man more room. "Don't bump me." The words don't carry much of a threat behind them. What's he going to do if they get jostled? Tear the man's arm off? They're both in the same position here, but he wishes he could be taking the train alone.