Đào tạo nô lệ - nhiệm vụ hàng ngày (7 nguyên lý của nô lệ hoàn hảo)

There are seven most important rules that every slave should be awared of. Those are essential if you want to become a perfect slave for your master. Listen carefully. Because your daily tasks should include at least on of those when you are on the path to become your best version of a slave