what procedure I need to go through to get the 24 or 144 hour visa free permit ?

You can apply for the transit permit after arriving.    An Arrival/Departure Card must be filled out on your flight. Flight attendants will give you.

1. After landing, follow (Baggage Claim ) then walk to immigration until you see China  Inspection and Quarantine, go to the 24/144 Hour International Transfer ,Apply for leaving airport  : show the officer 1 .Arrival Card   2. Pasport  3. Onward flight ticket  .You will get transit entry permit on your passport .                                                                       (Never go to International Transfer, you will never come out, it means you are ready to fly again )
2. Then take the escalator to the train ,  take the train ,get off at T3C.
3. Then follow the sign Baggage Claim and pass by Baggage Claim
4. ​Go Through Customs , Come out by Exit B, meet our guide .

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