Eunuchs were very powderful in the imperial court during the Ming Dynasty. Also unofficially known as '9000 years' (九千岁), which is only one rank below the Emperor (万岁). They even formed their own secret police unit, Eastern Factory (东场)which consist of highly skilled martial art agents is to carry out assassination, espionage and spying of political enemies.
Typical senior Eunuch is usually white hair and do not have any moustache or beard and speaks with a highly feminine tone. Have fully control of the entire imperial court including what time the emperor eat, sleep, pang sai and fuck which court ladies.
Don't play play.
All above fact or fictions from years of watching HK/TW/PRC movies. :p