Running away
" No, you cannot do this, your majesty!" Scholar Wei looked like Zhai Tianyu has actually announced his execution date instead of asking him to prove his identity as a man.
But Zhai Tianyu did not listen to his plea at all, why will he? If it was proven that Scholar Wei was not a whole man then it meant that he fooled not only his aunt but also him because no man who has lost his manhood was allowed to become an official other than a eunuch in the palace or the house of a minister, what was more a man was only turned to a eunuch under two conditions. One that he gives it up by himself once he sells himself or when he was caught in a crime and was punished with the punishment of not having a child or a family in the future.
If either of these was right, then it meant that Scholar Wei has broken the most important law of the imperial family.