Go for Green Lifestyle in Beijing! Beijing has putting up alot of efforts in promoting green electric tram, electric bicycle, bicycle and super convenience public transport with very low price (RM0.40 for one way trip of shuttle bus and RM1 for a one way trip of subway)
Of course, healthy green lifestyle bring great fitness body shape and slim figure for most of Chinese in Beijing.
Public Transportation in Beijing is excellence. I would say their transportation are seamless and please avoid to use their subway/shuttle bus during peak hour or weekend unless you wanna to have a great feel of become "human sandwich ".