Speaking of China's cultural heritage, the first thing that comes to your mind may be the Great Wall. Well, another great project is the Grand Canal.

How long is it? What's its role in China's development both in ancient and modern times? Check out the video to find out.

Script: Jiang Wei

Video editor: Cao Zinan

Supervisor: Wang Jianfen

Executive producer: Han Lei, Zhang Chunyan

Producer: Wang Hao

Luo Xiangyi contributed to this video.