Making it big in China's Silicon Valley

A growing group of young, talented graduates are heading to the Huaqiangbei area of Shenzhen in search of the next great business idea

Decked out in a simple washed-out T-shirt, skillfully operating a computer and various gadgets, Zhang Hao is easily mistaken for a student working in a busy laboratory.

But the 28-year-old college graduate, who was once an editor for a popular science association, has an unusual ambition - he wants to build a robot by 2027 that will clean your home.