Smile and hold the door when there is one. Politeness comes first. Then we can strike up a conversation and ask if they are tourists, too. How many days will you play? What is the itinerary? If he is alone, you can first say that you plan to go to place A tomorrow and ask her if she has been there. If so, can you recommend a restaurant or route? Then if you haven't been there, you can ask if you want to go together. I am a girl and often travel alone ~ so I have many acquaintances ~ I went to Holland before and met an American. (Finally, I didn't give myself contact information because it wasn't very nice. Let's just say, for me, less than 20% of people will leave their contact information in the end, and most of them are just acquaintances. I chatted with a handsome Dutch guy in Iceland before, and forgot to ask his contact information. I regret it until now! +FB & amp； Ins is more common, so you can create an account first. However, you should delete the selection before adding friends. Don't think that you met on the road. You need to add contact information after playing together for a day. Actually, there is no need to hahaha.