At the ward, while examining a patient…

EW: Uncle 您动过什么手术?

Patient: 福州人!我是福州人!

EW: Huh?

Me: (I stand aside and let them work it out…)

Patient: 你也是中国来的吗?

EW: 哦,我是广州来的!

Patient: 是吗? 哈哈哈! 福州和广州只是隔一条线 (or sth to that effect, everyone knows my mandarin CMI)

Me: (I stand aside and pretend I do not exist, lucky uncle din turn to ask me where I was from!)

EW: 哦,是的,是的!Ok Uncle, 好了! 谢谢您,对不起 妨碍您休息。。。

Patient: 不要紧,我把你当成我的孙女! (toothy grin)