the real-life tomb raiders began their daring plan by renting a restaurant across the road from guanghui temple in zhengdin county , north china at the start of february .
while serving snacks to the front of the building , a team on the inside was hard at work with shovels , ladders , and power drills - digging their way towards .
the criminal investigation bureau was tipped off about the group 's audacious plan at the beginning of march and a task force was assigned to the case .