how did mao actually start the cultural revolution?

sensitivelyambiguous asked: how did he actually spread the idea to the masses particularly in beijing? via speeches? via newspapers? how did the youths get to know about the cultural revolution, which eventually led to the formation of red guards.

Why are there so few ancient Chinese architecture?

Df S asked:
Considering how big China is and how long its history is, there seems to be a rather small number of preserved buildings from its past. There are a good amount of buildings from the Ming and Qing dynasties in Beijing and such but there are hardly any well-preserved buildings from the Tang. [...]