《资治通鉴·陈纪·陈纪七》
三， 天子一进后宫，几天都不出来，官员们要奏事，必须通过太监。 
其三， 大尊一入后宫，数日不出，所须闻奏，多附宦者 。
Third, once the Emperor entered the back palace, he did not come out for days. If officials had any business to report, they had to do it through the eunuchs.