Better user etiquette would make riding subway more pleasant

Tuesday's opening of the huge Shanghai Disney Resort Metro station, with its cool design that blends both Chinese and Disney elements, is the latest reminder of how far Shanghai has travelled in building its subway system.

In a little more than two decades, Shanghai has built the world's longest subway system. Now the network, 617 kilometers in total, is larger than that in London, New York and Moscow, although it will be overtaken in a few years by Beijing which has an ambitious construction plan underway.

In Shanghai, the subway is an efficient and environmental friendly means of mass transportation for the 24 million residents in a city where streets are increasingly clogged by the growing number of cars and where air is often filled with car exhaust fumes.