When you get off a train, come outside of the station and want to get a taxi, you need to go to the taxi line, which is right across the sq., like almost everywhere in China, there are always so many people on the sq, you may not see the taxi line. the taxi from the taxi line are all having meters ON, if you just get a taxi from the road, you will need to negotiate a price first, and most likely the driver going to ask 3-4 times what you would pay for a metered taxi.
If you HAVE to go to train station to get tickets yourselfs, like us since train tickets offices in the city may not sell tickets to foreigners, the ticket window 18 is for military, foreigners and etc.
Zhengzhou airport is new and pretty far from the city, not sure how much would be to take a taxi, but we took the airport bus from train station to the airport for 15yuan per person, you can get the ticket from zhengzhou da jiou dang (zhengzhou big hotel), and it departs right in front of the building. It is right across from the train station (the exit from the old part, the new part of train station is behind the old part, the new one is mostly for fast trains to xian, Beijing ). Airport bus is every half hour, it takes one hour to the airport (without traffic jam)
This is the most crowded railway station I have ever used. The crowds were spilling across the plaza in front - and this was at 8pm!
Zhengzhou is at the epicentre of the Chinese railway system, so many people change here.
There is a 4-star hotel with a tiny bar-cum-coffee shop right next door to the main station entrance (to the right as you look at it). You can wait here, and we also rented three rooms for two hours....clean, comfortable and quiet!
Some guidebooks and maps show the airport to be close to the city and to the northeast.
It isn't. It is some distance to the southeast, along the new highway.
Allow at least one hour from the centre of Zhengzhou to get to the new airport.
The airport is, by the way, very modern and very empty.