Hi, Can anyone advise how to go to Xi'an from Hong Kong by bullet train?

There is no direct bullet train between these two places. Thus you are advised to pass the border from Futian Port and enter Shenzhen first. Then take subway line 4 to Shenzhen North Railway Staion. After arriving, you can take the high-speed train to Xian North Railway Station. The schedules are 09:35, 10:00 and 12:50. The duration is about 10 hours. Besides, the ticket fare of second class seat is CNY888, first class seat is CNY1401 and business class seat is CNY2768.