The bus is designed to look like an imaginary forest and runs for five days from March 24, 2017. /CFP

It was decorated with local seasonal plants by florist Alfie Lin and designer Xiao Qing-Yang, with the concept of integrating more green space in cities. /CFP

The “forest bus” serving route 203 is the first of its kind. Passengers appear to have responded well to the concept of turning the bus into an observatory. /CFP