Here are a bunch of blogs those I learnt and I liked. Capture-the-Flag Black Bauhinia: https://b6a.black/ This is the Capture-the-Flag team I founded with some Hongkongers on 2019. Contains a number of writeups on various CTF games. Cocousin = Usin: https://klwu.co/ Cousin is a crypto guy in Black Bauhinia who is researching for his master of philosophy, and who can do math much better than I do.
