You know how to make a long distance call, but do you know how to save money? IP system are recommended for convenience and low price. 

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Via Cell Phone 

China Mobile:    The user only needs to dial 17951 before entering the area code, without having to input the long card number and password.   03 yuan/m+local call fee 

China Unicom: The user only needs to dial 17911 before entering the area code, without having to input the long card number and password. 03 yuan/m + local call fee 

Via Public Booth 

Telephone booths can be seen everywhere on the street. Most of them are IC card phone. Generally IC telephone cards are available in amount of CNY20.00, CNY30.00, CNY50.00 and CNY100.00. those are the face-value, so just need to pay about 23 yuan to get a 50 face-value IC card. The user only needs to dial 17909, before entering the area code, without having to input the long card number and password. the fee is about 0.4 yuan/m including local call fee. Taking the discount into account, you just pay 0.4*23/50=0.18 yuan (Q: Why the fee is made up of two parts?

A: you first need to use the local phone network, then through it to access to the IP phone system) 

There are lots of other method to access IP phone system. but they need to input a long chain of numbers and password. It is very inconvenient, especially using IC booth at night, how can I recognize the tiny number on card. 17909 is a better choice