Originally Posted by
zappa42m
Is it the same procedure as transit international to international in the US. (enter the country and then normal checkinn)
And are 6 hours enough ?
As said above by moondog it is substantively the same as I-to-I in the US, so yes, enter country and then leave the country.
Note that depending upon your passport and visa situation, you may want to know how 'transit without visa' works. There is a lot of information here:
China 24, 72, and 144 hour Transit Without Visa ("TWOV") rules master thread