It has been 27 years: the “bird-expelling box” on Ji’nan Yaoqiang Airport.

　　Ji’nan Yaoqiang International Airport, familiar to Ji’nan citizens and travelers , where hundreds of flights take off or land everyday , taking people to each place in the world or to Ji’nan. What’s behind safe taking off and landing is a flock of people who pay in silence to ensure the safety of passengers, they are “bird-expelling ” persons.