人数激增。
The number shot up.
to increase rapidly; to shoot up
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.
人数激增。
The number shot up.
订单激增了。
Orders increased rapidly.