I'm taking the 7:55 flight to Guilin. I believe the first shuttle bus from the Melody Hotel is at 5:40 and the trip takes about an hour.

That would get me to the airport at around 6:40. Is that enough time to check in for my flight?

Is it likely the bus would be full and I would need to wait 20 minutes or for the next? If that were case, I might miss my flight!

Alternatively, how much would a taxi be at that hour? (I'm staying at the Han Tang Inn near the Bell Tower.)