Dozens of self-driving taxis have been put into use in China's Changsha city.<br /><br />Users can hail a taxi for a free ride on a designated mobile app under Baidu.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
