Robotaxis are taking over China's roads. Here's how they stack up to the old-fashioned version.

Beijing — So-called robotaxis are popping up all over China. Tech giant Baidu, better known for its search engine and sometimes referred to as China's Google, is among the companies testing the self-driving taxi service.

Baidu is currently testing its self-driving taxis in 10 cities across the country, and it just got approval to roll out fully driverless vehicles in the major metropolises of Wuhan and Chongqing.

In the capital, Beijing, where the company is based, a human is still required by law to sit in the front passenger's seat — but they haven't got much to do.