This portrayal is a stroke of God, let's first look at the process of Nian Qianyao washing Yongzheng's feet.

Nian Qianyao was originally Yongzheng's clothed slave, but he was a very ambitious person, fierce (slaughtering Liu Jiazhuang), excellent face (shoucheng gate still wearing a yellow coat), such a person is not willing to be a slave.
At that time, the old fourteenth and the thirteenth fought for the great general king, and whoever held the military power could get the world. Originally, the Eight Ye Party was very shrewd, and strived to make the old fourteen the king of the great generals, and once Kangxi died, they could control the capital inside and outside. And if you put old fourteen in the northwest to lead the troops, there is no way to compete with yourself for the throne in the capital.
It is a pity that people are not as good as heaven, and the heaven above these people is Wu Si Dao. Wu Sidao told Yongzheng that Old Thirteen did not have to fight for this great general king, and he had more important things to do in the capital. (Later, for the right to fight for the military power of the Fengtai battalion, the old thirteen was the one who carried the ding.) Although old fourteen is in charge of the army, the soldiers who do not have food and grass are dead soldiers. And as long as Nian Qianyao became the governor of Sichuan and Shaanxi to choke the army food of the old fourteenth, the old fourteen could not jump up.
So Yongzheng told Old Fourteen that he was willing to support him as the Great General King. Old Fourteen was happy to hear this, and in return was willing to recommend Nian Qianyao as the governor of Sichuan and Shaanxi.
Nian Qianyao, only knowing that old fourteen recommended himself, did not know that all this was Yongzheng's arrangement. So as soon as I arrived in the capital, I didn't go to see my own legitimate master, but first went to find the old eight and the old fourteen, which was to change the rhythm of the court!
Of course, the fourth elder could not bear this kind of thing, so he greeted the officials and did not let Nian Qianyao take office, and Nian Qianyao panicked at this time, and only then did the scene of washing his feet happen.
Nian Qianyao washed Yongzheng's feet, which originally showed an attitude: I will always be your slave. Yongzheng saw that he had a very good attitude and forgave him. At this time, Nian Qianyao was preparing to pour foot washing water, and when he heard that Yongzheng had forgiven himself, he also poured a fart footwash water, and I would not pour it myself. This scene can be said to be the character of Nian Tangyao portrayed vividly and exquisitely, when I use you, I can do anything, don't say pour foot wash water, drink foot wash water I dry. When I don't have you, I don't even want to look at you.
In this drama, Nian Qianyao is a negative character, and in the end, Nian Qianyao is a wolf, not a dog, which is why his tragic ending. If he calls himself a dog like Li Wei, I think he can die well.