久仰，久仰！
I have long been looking forward to meeting you.
I have long desired to meet you.
久違了。
I haven’t seen you for ages/for a long time.
It’s been such a long time since we met last time.
久聞大名。
I’ve heard a lot about you.
這次由我負責全程陪同你們。
I will be with you for the entire visit/trip．
歡迎你到中國來。一路上辛苦了! / 一路上還好吧？
Welcome to China．I hope you’ve had a good flight．
或I hope you enjoyed your flight. / How was your journey?
謝謝你專程來接我。
Thank you very much for coming all the way to meet me.