Welcome to the Files!
Not much is known about [0142] I'm afraid. I only have 2 entries in the database for this factory and the year code format changed in between them.
The first is a 1972 build model with a year '72 prefix just like yours but a hundred or so units older. S/N is 7201xx, so the same # of digits as yours. Note that relying on the number of digits, "millions" etc. is extremely outdated. The "millions" is irrelevant as the Chinese are known to have used 4 all the way through 9 digit numbers in their receiver serial numbering. They were consistent in their approach, however, and there is a year code or actual condensed year date contained within the receiver S/N of 90% of the Chinese SKS carbines out there.
The second is a year 24 (1979) built carbine again with six digits (2401xx). The change from using the actual year to the year code (1956 being the first year of production or year 1) was probably made to try and standardize markings across all type 56 factories since from around 1976 or so, the actual year codes are no longer seen on type 56 carbines. I have never seen a carbine marked with a condensed '77 date or higher date even though we see production at various factories continue all the way through year 29 (1984).
You might post some photos of it and others can give their input or you could enter it into the Chinese survey using the link in my signature.
Again welcome to the boards.