A new type of high-tech and spacious trolley bus with four doors has been successfully developed in Beijing. 

Unlike two-door buses, the design aims to hold more passengers and eliminate crowding when getting on and off the buses.

The bus, produced by Beijing Transport Corporation, is 16 meters long and can accommodate 160 passengers.

The design incorporates an advanced braking system that increases efficiency and reduces noise.

The bus will be put into mass production once the design is officially approved. 

(CRI July 10, 2004)