I was confused as the article keeps referring to “TEGES” with no clear explanation of what this acronym means. After digging around on the internet (in vain), I re-read the top portion of the article and figured out that it must mean “The Essential Guide to Electronics in Shenzhen”, which is apparently some sort of crowd-sourced/crowd-funded book ...
> One of the very first things I did was get my hands on Bunnie Huang's “The Essential Guide to Electronics in Shenzhen” (TEGES from here on forward) off of Adafruit's site