I don't know the code system, for me they are random 3 numbers(like Plant 504 : ...

		Vincent_Yan404 22 days ago \| parent \| context \| favorite \| on: Growing up in “404 Not Found”: China's nuclear cit... I don't know the code system, for me they are random 3 numbers(like Plant 504 : A uranium enrichment facility.)Thank you liking it, I will post the second part on Monday.