Some 4,000 years have gone by since the collapse of these primitive communes and the transition to class society, which took the form first of slave and then of feudal society.

• 而从原始公社崩溃，社会生活转入阶级生活那个时代开始，经过奴隶社会、封建社会，直到现在，已有了大约四千年之久。