After-school tuition and cramming classes have become a big business which will be worth 1 trillion yuan by 2018

Xu Liping is an accountant at a hospital in Shanghai and wants only the best for her daughter when it comes to education. But the "best" can be expensive.

The 38-year-old did not hesitate to fork out 1,200 yuan ($187) for a two-hour English-language cramming course for Wang Jingxuan, who is just 12.