广场上人山人海。
The square is packed with people.
(idiom) multitude; vast crowd
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.
广场上人山人海。
The square is packed with people.
商场里人山人海。
The mall is packed with people.