this morning I read a news "books on the underground ". a rich businessman of chinese  launched this project ,they prepared 10000 books and droped in sports on subway ,Didi cars, and carpooling, in order to convinent  for passenger to read these books ,but these books is hidded in different place so there will have a activity that is  find book campaign. a lot of actors .host. business man to join . for this activity in order to effect more and more people to join reading and like reading book . for me , I like this activity because  I also like reading , hope this voluntary activity will popular more and more city . not only for shanghai ,beijin these big cities .