No escaping the peace sign in Southeast Asia, especially Vietnam, and most especially in Sapa.
Characteristic of Sapa are the village girls who attach themselves to trekking groups, chatting and joking in astonishingly fluent English. They even know jokes and idioms. Many don't go to school, but pick it up from talking to foreigners!
This girl accompanied us on our first day of trekking. Often, their hope (expectation?) is that at the end of the day you will buy something from them.
Read more about the hill tribes and trekking in Sapa.