use LWP::UserAgent;
use Encode;
my $content = LWP::UserAgent->new->get('http://flight.qunar.com/site/oneway_list.htm?searchDepartureAirport=%E5%A4%A7%E8%BF%9E&searchArrivalAirport=%E5%8C%97%E4%BA%AC&searchDepartureTime=2016-07-28&searchArrivalTime=2016-07-31&nextNDays=0&startSearch=true&fromCode=DLC&toCode=BJS&from=flight_dom_search&lowestPrice=null')->content;