Why did Kangxi particularly like his eighteen princes?

Brother 18th, if I remember correctly, it was Essien Qiao Luo Yincuo. Xiaoyincuo died very early, at the age of eight. The reasons why Emperor Kangxi likes him are: first, Emperor Kangxi is naturally happy when he is old; Second, Yincuo's mother Wang is very red at this time, and Yincuo is naturally red! Thirdly, Kangxi was very disappointed that all his brothers were vying for the throne, and the birth of the small Ginza made Kangxi feel a little gratified. Fourth, when Xiao Ginza was seriously ill, the second brother and Prince Ginza were very indifferent to his brothers, which made Kangxi feel that Ginza didn't care about his brothers. Then there is Xiao Ginza.