I misremembered the departure date. When I went back to hotel, there was just 1 hour 40mins before the flight time. I packed my stuff immediately while the hotel staff helped me to check in the flight online and print the boarding pass. They also informed the airline so that it could specially arrange in advance for baggage drop-off. They also arranged the taxi waiting outside the hotel. They assisted me to pack the belonging and check anything left behind in the room. Finally, it took me 35mins to travel to the airport and 25mins to get to the boarding gate. I could catch the flight finally. Without the help from the hotel staff, I could not make it.