train or flight from Guilin to Hong Kong

The Guangzhou-Shenzhen-Hong Kong high speed railway has opened about two month ago, which provides great convenience for guests who want to go to Hong Kong from Chinese Mainland. You are suggested take a high speed train to Hong Kong instead of by plane. Because it will only spend around 3.5 hours from Guilin to Hong Kong. But if you choose flight, it will take more than 7 hours and the fare of flight is more expensive than train ticket.