This standard specifies the track location of the read-only magnetic records (track 1 and track 2) on the identification card for automatic data exchange.
1994GB/T 15120.4-1994 Identification cards--Recording technique--Part4: Location of read-only magnetic tracks--Tracks 1 and 2
GB/T 15120.4-1994 Identification cards--Recording technique--Part4: Location of read-only magnetic tracks--Tracks 1 and 2 was changed to GB/T 15120.2-2012 Identification cards.Recording technique.Part 2:Magnetic stripe.Low coercivity.