A boarding pass of a Bell-429 helicopter on May 15, 2015. Thousands have applied for helicopter sightseeing via an app available on mobile devices from May 15. Helicopters at their service are Bell-429 worth 78 million yuan ($12.5 million) and Bell-407 worth 35 million yuan. Passengers, each covered with 3 million yuan insurance, will have to pay 1,999 yuan or 3,500 yuan - based on different types of helicopters - to get the experience, with free pick-up and delivery services. [Photo / IC]