Who is the father-in-law of Longmen Escort Agency, and how is he so similar to Lu Sanjin?

Is his uncle, uncle, his father often-Lu Qing's brother, when lujia failed, his grandparents wanted one of the two brothers to enter the palace to be the eyes of the family, but at that time, the family didn't have enough money to buy an official, so they had to go in as a eunuch. Dad Lu is stupid and too real. When the two brothers drew lots, their father-in-law cheated, marked the lot, but caught the wrong lot. It turns out that grandparents Lu thought their brother (father-in-law).