Wheels of change bring a new route to convenience

Company chiefs say bike-sharing firms use technology and innovation on road to success

Zhang Qiang, a 30-year-old engineer, was stunned when he saw that his bike, parked near a subway station in Beijing, was surrounded by fleets of internet-connected bicycles, which can be borrowed and returned with just a smartphone.

This is the Rainbow War as each bike company paints their products in orange, blue, yellow, green and other colors. Within just a year they have become a common sight in major cities.