i want a taxi to pick me up to train staion at 4:00am on the 18th of February 2015

Well, generally speaking, it's easy for you to find a taxi that can take you to the railway station.But according to your arrival date, it's the Chinese New Year. So there won't be many taxies.
You may try to book the taxi in advance. The contact numbers are
67776777 or 96520. However, I am not sure if they can speak English. If possible, find someone else to help you finish your booking.