China sounds great, Dongbing. I hope you have a great time. The iPhone is a global device so you will be able to use it in China. Select the link to view the rates and dialing instructions...http://www.verizonwireless.com/b2c/tripplanner/tripplannercontroller
You will need to activate global service. Dial *611 from your iPhone 5 or I can help you get your global service activated. The SIM will also need to be activated for international usage. If you would like my help completing this process, follow me (ChaunceyM_VZW),send a direct message and include your contact number. Either way, have a safe trip.
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The Iphone 5 uses a nano-sim card not a regular sim card. Most countries have sim cards for better local access and no roaming charges. Look for them when you get to the airport in China you are going to.