Hi Sunwayennifer,
Re: "I am a Chinese printer factory, how can we get the AirPrint technology?"
Seems you would like to add AirPrint capability to the printers you manufacture in your factory.
As we are an Apple user-to-user community, there may be no-one here with the knowledge you require.
The "Related article: above your questions. lists the AirPrint enabled printers from various printer-manufacturers.
Seems you would need to contact Apple Support in China, to find out who to speak with for replies to your business questions about Apple's AirPrint technology:
Apple Support lists phone numbers all around the world:
Eg: Contact Apple for support and service - Apple Support
Says:
China mainland (1 Local and national telephone rates apply.)
400-666-8800
Else: If you are want to use AirPrint on your own devices, Apple support has articles online (links below).
Connect an AirPrint printer to a Wi-Fi network - Apple Support
Print wirelessly from your Mac to your printer - Apple Support
Use AirPrint to print from your iPhone or iPad - Apple Support
All the best :-)