well, such things are just unavoidable in a great metropolis like beijing. i think a still more desirable benefit is psychological. bicycling home after work can help release your stress. life in the offices is miserable. you just sit there in a daze, gazing at the monitor and dealing with files and documents. why don't you give a full play to your energy after work? enjoy the speed on the road. just think, you are flashing past the poles with your own energy. how great!