BAO OR TREASURE
Bao translates as “the three preciouses” – the testicles and penis. The new eunuch’s bao was put into a container with a capacity of about 24 fluid ounces, sealed, and then placed on a high shelf

1 Every time a eunuch received an advance in rank he had to pass a strict examination. Promotion was impossible without the bao. The examination process was called yan bao, and was lead by the head eunuch. The inspection was often a source of profit for knifers, because sometimes careless or ignorant eunuchs forgot to claim their “precious” after emasculation. They would then be forced to pay a high price to recover the bao. Bao were sometimes borrowed, purchased or rented.
2 When a eunuch died, he was buried with his bao. If he didn't have his own, he would try to obtain another before his death. Eunuchs wanted to be as complete as possible when leaving this world because they believed they would have their masculinity restored in the afterlife. Tradition had it that Jun Wang, the king of the underworld, would turn those without their bao into a female mule. The ancient Chinese had a great fear of deformity.
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