Uber, which has a valuation of $US50 billion, is going all guns blazing into the world's most populous market and it needs more ammunition.

Uber stuck in Chinese traffic jam

Is investing in Uber - the ride-sharing app that has had two of its managers arrested, drivers' cars torched and equity valued at 125 times trailing revenues - just a little too tame? Welcome to Uber China.

The app boasts 30 million users after its first year, as it makes internet access more widely available and affordable in developing countries.

Start-up connects world with free mobile data

A start-up is quietly challenging Facebook's efforts to connect emerging market consumers to the internet, signing up 15 times more telecoms operators than the high-profile effort led by the social network.