after doing some digging i believe it came from fudan university, however that page appears to be completely scrubbed from the internet and i can’t find it anywhere. maybe someone else could have some luck? it was a really good resource. it explained it visually so it made it really simple to understand.

i found some bullshit from southchinamorningpost that appears to be trying to ape what fudan did but it has no detail and it obviously a bunch of anticommunist propaganda so fuck all that