Does not belong to any department. 40% to 90% of white houses do not belong to any department. Forty-nine percent of the White House was the yamen of the Ming Dynasty. Whitehall in Sijiucheng is a eunuch system in Ming Dynasty, and it is an institution for eunuchs to serve the emperor and his family. It is a very large and rigorous system, with twelve prisons, four divisions and eight bureaus, each with handprint eunuchs and prefect eunuchs.