There is nothing such as foolproof technology - that's why a large part of the firewall is powered by people. It helps develop computer skills in a large part

There is nothing such as foolproof technology - that's why a large part of the firewall is powered by people. It helps develop computer skills in a large part of the population that would otherwise be out of work, and you reach your censorship targets at the same time. I think tens of thousands of young people (if not more) are employed as "firewall monitors" in China.