What is the meaning behind Kangxi's reward for Li Hongjin?

In the TV series Yongzheng Dynasty, Kangxi gave Jin Ruyi, a symbol of kingship, to his grandson Li Hong, not his son. There is still a deep meaning in this. Kangxi did this not only because he liked his grandson Li Hong, but also because he wanted to see how many ministers supported his son.

Kangxi said in advance when hunting in Jehol that whoever caught the most prey would give this Jin Ruyi to him. But the third hunts the most, and the eighth hunts the most. But why didn't Kangxi give these two sons? The third child has no heart, he is very brave. If he is made a prince, he will not know how he died in the end. Then why didn't Lao Ba get Jin Ruyi? Kangxi had this plan, but after the case of punishments, he was not prepared to give this Jin Ruyi to him. Xiao Guoxing gave up the prince in the case of punishments, and Kangxi sent the old eight factions to review the matter. He also handed the task of entertaining the Mongolian prince to Lao Ba. What he did made others think that he wanted Lao Ba to be a prince.

Later, a few days before hunting in Jehol, the spies sent by Kangxi came back to report the situation, and he finally knew that Lao Ba was lying to him. It turns out that Lao Ba is using Xiao Guoxing to frame the prince. In addition, when hunting, Mongols supported giving Jin Ruyi to Mei. They said that Mei was a benevolent person and deserved it. Kangxi was unhappy.

Just as Kangxi was in a dilemma, Li Hong stood up at this time. He said that Manchu people have hunted for a living since ancient times, and now Grandpa Huang has also hunted many prey. Isn't grandpa Huang a benevolent man? Later, Li Hong said a bunch of nice things, saying what was Kangxi? Manchu first Batu? Something like that Anyway, his flattery is first-class Seeing that his grandson was so talkative, Kangxi gave this picture of Jin Ruyi to Li Hong.