If you want to get a Changzhou card, you need to rent it cheaply for several months, and nothing else is needed. Do you have a good card type introduction?

I recommend you to use Unicom card, because Unicom card will often have activities and give away a lot of traffic. My classmate just uses Unicom to give away 1 G traffic every month, which is super cool.

If you are mobile, you can enjoy great discounts by opening a free package and superimposing it with the online package.

Now just deal with the Wo3G A plan.