this is to let you know that the meilan airport does not has the China Mobile outlet to purchase the prepaid phone card. I got it from the town shop- China Mobile outlet. to purchase the "set meal" RMB 18 for 70 min free for each month ( starting 1st of the month), subsequent min is 10cents ( can only call in china). if want to call overseas, need to deposit RMB800.
I also buy the internet package, RMB30 for 700MB for each month ( starting 1st of the month),
Need to show passport to register the sim card.
they have a variety of set meal eg RMB 50 for 1000MB for each month.
I call them to temporary stop my SIM before I leave China