No, it is just the Myanmar registration system.
The new Yak-130 are 1801, 1802 et cetera
The F-7 are 1601, 1602 et cetera
The MiG-29 are 2701, 2702 et cetera
The K-8 are 3901, 3902 et cetera
So, the first two digits are unique to the type but have no further significance nor relation to subtype...