Best Blackhat Forum

https://www.udemy.com/course/beginners-guide-to-real-life-applications-of-blockchain/

Understand the main concept behind the blockchain, and find out how it can improve the world.
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1hr of on-demand video
Created by Siim Õunap

for your great works here Leejiacheng1 !!

Just in case anyone is tempted for this one...be warned:
It is visibly just uploaded PLR.