How tall do you have to be, to become a model? Well, pretty tall actually. Dong Lei, is only 20-years-old, but she's already taken over the Internet by storm. What's even more interesting is that her legs are 45 inches long.

That's as tall as an average 7-year-old boy.

Dong Lei was a trainee teacher prior to becoming a model and was discovered after entering the Chinese television show called "Supermodel."

Her parents encouraged her to train as a teacher at university, but after graduating she decided to enter a modelling competition in

Beijing and was later signed by a modelling agency.

She gained fame across China after entering ‘Supermodel’ and has earned herself the nickname ‘tui tui’, meaning long legs.

She said: ‘I find it incredible that I have suddenly become an internet celebrity!’

‘I really enjoy my life and work at this moment, I fly around a lot and my work is also partly like a holiday. I will work hard to succeed going forward and hope for the best.’

Check out a video of her: