First of all, the oldest one, that is, the one with the worst effect, begins by saying "You are so tall", which is equivalent to exposing yourself there, because others don't know how to respond to you. If you say hello like this, people will definitely say "hello" back to you. So how do you talk next and start introducing yourself? What old routine? I don't want to chat with you at first sight.
Therefore, the first way is very old-fashioned and not recommended, so the second way, WeChat pick up girls, WeChat chat must have something to do, nothing to find, can provide you with a topic. For example, if you look at what happened in her circle of friends, you can use this topic to ask her, for example, what was it like when you went to a place to play? That's how you talk.