Great Wall Julong 1250W power supplies have recently appeared in large numbers on Xianyu. The price is often around 100 to 200 RMB, so the value can be quite good. The problem is that many buyers do not know how to read the manufacturing date. The method below uses the serial number printed under the barcode.
Query by the Serial Number Under the Barcode
There is an 11-character string under the barcode, as shown in the example image.
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The first two characters indicate the year:
Code Year 20 2000 21 2001 .. .. 29 2009 2A 2010 2B 2011 2C 2012 2D 2013 2E 2014 2F 2015 2G 2016 2H 2017 2I 2018 2J 2019 2K 2020 -
The third and fourth characters indicate the month.
Example
In the example above, the production date is May 2018.