Day 1: On the day of travel, take the flight to Xi'an according to the flight time, pick up the airport and stay at the hotel in Xi'an. Day 2: Xi'an - Huashan Scenic Area - Xi'an Day 3: Xi'an - Yellow Emperor Mausoleum - Xuanyuan Temple - Hukou Waterfall of the Yellow River - Xi'an Day 4: Send the plane back to the warm home in Xi'an according to the flight time, and end the pleasant trip