The roar of engines fills the night air in China's Chongqing city as tourists awkwardly clamber onto gleaming motorbikes and cling to muscular drivers to star in personalised videos. Chongqing has been an industry hub since 1979, when state-owned military equipment manufacturer Jialing began producing civilian motorcycles in the city. Motorbikes quickly became popular, and the city now accounts for more than a third of China's total motorbike production. "When (tourists) take photos and videos, they may come to like motorbikes and learn to ride, then buy a bike," he said. - Roaring business -For the local bikers offering videos for tourists, Chongqing's motorcycle prowess is a business opportunity.