premise: Piles of deserted cellphones -- most of which worked perfectly though weren't stylish enough -- have overloaded the resource-thirsty Chinese economy and threatened its environment with massive electronic waste, whose proper disposal remains a problem.
  On top of it, to buy a trendy cellphone every three months is not a piece of cake even for many extravagant consumers.
  "I saved for six months and was even ready to cut my meals to buy that cellphone. It cost 5,000 yuan (616 US dollars) but is worth it -- it has a superb lens and make very good videos," said a junior clerk at a Beijing bank, surnamed Yu.
  This is already his third cellphone in two years, though Yu makes less than 4,000 yuan (493 US dollars) a month, nearly two thirds of which has to repay his housing loan.
   What did Yu do that allowed him to buy that cell phone?
hypothesis: saved for six months