你在干什么?
What are you doing?
tree trunk; main part of sth; to manage
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
你在干什么?
What are you doing?
别干那么多,休息一下吧。
Do not work so much, take a break.