Hailed as the environmentally-friendly future of personal transport in the country's teeming cities, Chinese commuters in their millions are turning to electric bicycles.
Up to 120 million e-bikes are estimated to be on the roads in China, making them already the top alternative to cars and public transport, according to recent figures published by local media.
"This is the future -- it's practical, it's clean and it's economical," said manufacturer Shi Zhongdong, whose company also exports electric bikes to Asia and Europe.
The bikes have been hailed as an ecologically-sound alternative in a country which is the world's top emitter of greenhouse gases, with their rechargeable batteries leaving a smaller carbon footprint than cars.
But some have expressed concerns about the pollution created by cheaper lead batteries, calling for better recycling and a quick shift to cleaner, though more expensive, lithium-ion battery technology.
More than 1,000 companies are already in the e-bike business in China, with many of them clustered in the eastern coastal provinces such as Jiangsu and Zhejiang, which both border Shanghai.
Another 1,000 firms are producing e-bikes on an ad hoc basis, Shi told AFP during a visit to his Hanma Electric Bicycles factory in the port city of Tianjin, about 120 kilometres (75 miles) north of Beijing.
"The business has exploded since 2006," Shi says, while admitting that the company took a hit last year due to the financial crisis.