Start of the plan

The Emperor was simply stunned after hearing the sudden confession. He placed the teacup on the table and then turned to look at Eunuch Xi jerkily before asking," Eunuch Xi, my dear… are you …are you really sure?" 

A minister trying to molest his eunuch was different from any other accusation. If it was proven that Old Master Su was trying to do something unsettling with Eunuch Xi, it would be really troublesome not only for him but the court as well. 

Eunuch Xi hesitated before shaking his head. He then said with a slight tremor," Your majesty, I cannot be sure. Let's just forget about it." Though he said that he looked extremely reluctant, causing the Emperor to furrow his brows, he could not understand what was happening. But he knew that Eunuch Xi was a man of pride, he would never do something that would ruin his reputation as such. 

Thus, not once did the Emperor think that Eunuch Xi was lying.