It would be great if there was another way he could meet Tav without pulling a knife, like if Tav had a high enough passive perception to say "Hey I can see that knife of yours mate. You pull anything and you’ll be Eldritch Blasted into Avernus. "
He’s supposed to be this charming rogue, but he can’t try conning Tav into doing instead of violence
Even then, 1pm in Beijing is something different than 1pm in the Tibet since all of China is technically one time zone.