I would translate the second sentence like this:
Zhao Benshan tricked Wei Fan into buying a bicycle.
To con somebody out of something：
Benshan Zhao conned Wei Fan out of his watch. http://www.ldoceonline.com/dictionary/con_1
to dupe someobdy into doing something：
Benshan zhao duped Wei Fan into buying bike。 http://www.ldoceonline.com/dictionary/dupe_2