An accident happens in China

An accident happens in China. The accident injures a person’s spine. There are nerves inside the spine. The accident also injures the nerves. The person cannot move because of this.
However, this problem is changing. Experts have a new material. This material can regenerate the nerves.
Doctors operate on the person. The operation takes 4 hours. Everything goes fine.
Difficult words: spine (the line of small bones in your back), nerves (lines inside you that your body uses to send information), regenerate (to grow something again).
You can read the original story and watch the video in the Level 3 section.