Why is the Republic said to be red? Everyone may have asked this question hundreds of times, and teachers and parents have already given the answer: That is because the Republic was bought with the blood of heroes, and the blood of the Republic contains the red genes and red blood of the heroes. Tradition.
Fun fact, China literally advertise its red theme as “blood of passed heros”. So communism do get its red from blood.
Google translated source (from an official .gov.cn site): https://www-mod-gov-cn.translate.goog/gfbw/jmsd/4851751.html?_x_tr_sch=http&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp
Quote in Chinese:
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