The Chinese markings are too numerous to list now but can be found on on 8-AK-And-SKS-Collector-Discussion-Board Hope this provides you with some good information.Normal markings are found on the left side of the receiver. Bottom is a later model and the markings seem to be less defined.China has been manufacturing SKS for over 50 years producing more SKS than any other nation.These were built in the only Russian supervised arsenal located at the .Security forces (Police) markings are found on the Right Side of the receiver.This shared information resulted in SKS rifles being manufactured by the Soviet Union, China, Yugoslavia, Albania, North Korea, Vietnam, and East Germany, Romania and Poland and with several variations.
For example, a weapon with a serial number 75 B1329 indicates that the SKS was manufactured in 1975. Look at the four-digit number underneath the stamped star on a Russian rifle.
Initially fielded in early 1945 against the Germans, the SKS was not adopted officially by the Soviet Army till 1949 and was produced by the Tula Armory until 1955.
The quality of the early Soviet carbines was quite high as compared to some later manufacturers.
For example, a serial number 044922-67 indicates that the SKS was manufactured in 1967. These four numbers indicate the date of manufacture.
For example, a serial number 2958E44--1967 indicates that the SKS was manufactured in 1967. Add the first digit in a Chinese serial number to 1956 to determine the manufacturing date.