The Provincial Commander's Self-Cultivation

Qihuang Kingdom was run by women, and as the head eunuch, Yan Lang’s dream was to mix in, eat, wait for death, and resign from office with honor, while disguising herself as a man. However, Yan Lang unexpectedly encountered the biggest failure of her career when the new empress ascended to the throne.
Wait a minute! Why was the empress a male? Yan Lang barely managed to convince the empress to spare her life, but without even the time to celebrate, that damn empress forced a pill down her throat.
“All this drug will do is keep you in check. Behave well, and I will make sure you have nothing to worry about.”
“Just be a good empress! Starting from today, I’ll be your loyal subject during the day, and kick your ass in the evening!”
Every day, Yan Lang wanders on the brink of danger, for someday, the empress may discover her secret: that Yan Lang, the provincial commander, is actually female!