Despite dramatic decreases in the number of cyclists in Chinese cities over the past 15 to 20 years, transport of goods and products, informal collection of recycling, deliveries and use of bicycles for retail and selling is still very common.
I’ve uploaded a photo gallery (Flickr set) of some of this activity easily seen in Shanghai. While Shanghai is in many other ways a very modern and advanced city, the continuing use of bicycles for so many purposes seems directly related to the presence of so many people willing (or forced) to work for extremely low fees, for which the bicycle remains by far the cheapest and indeed the only affordable means of transportation. Especially over short delivery distances, it would seem to many Chinese almost wasteful to use a truck.
One of the few official agencies still using bicycles is China Post, whose beautiful green delivery bicycles (complete with panniers) can frequently be seen parked in front of buildings.