A mechanic holds a plug before charging a BYD E6 electric car, used as a taxi in Shenzhen, at the taxi company's car park, in the southern Chinese city of Shenzhen June 15, 2011. A pioneering electric taxi project in China's southern economic powerhouse of Shenzhen seems a success by most accounts. Riders are enthusiastic, there have been no accidents and drivers are termed "gracious," not a term usually applied to mainland drivers. The pilot project, which could be replicated in other cities, underpins China's ambitious plans to put at least half a million electric vehicles (EV) and plug-in hybrids on the road by 2015. Picture taken June 15, 2011. To match Analysis ETAXIS/ REUTERS/Tyrone Siu (CHINA - Tags: TRANSPORT BUSINESS)