how much cost to take taxi shenzhen airport to railway station hotel for 6 pax?

A taxi can only accommodate 4 ppls, so you need to hire two cars. It costs CNY120-130/car to Luohu Railway Station. There is no need to book in advance. Just line up and take one after getting out of the teminal building.

If you will take the high speed train, the cab fare is CNMY90-100/car. The train ticket costs CNY180 for a second class seat and CNY288 for a first class seat. It is suggested to make a reservation, and I know Travel China Guide can do this. You can search the schedule and sumbit the booking directly at their train page. Or write to them at bookingtravelchinaguide.com!