It turns out that the purpose of burying people alive and faking their deaths once in the seed base is to deceive the immortal officials who enforce the law and avoid disaster. Later, it evolved into the technology of "Yin and Yang Zhai Yong", in which body double was buried in advance to absorb the atmosphere of Longdong, prolong his life and increase his happiness. The reason is similar to that the common people build a "life sacrifice" or a "life sacrifice" for an upright official or benefactor and return their merits to the benefactor.