Answer:
The reader can most likely conclude that P'u Yi D does not often have the opportunity for uninhibited playtime.
Step-by-step explanation:
P'u Yi is an emperor and, as such, he is surrounded by rules and ceremonies. His life is not a carefree one - even when he wants to play, he does so with the eunuchs, who are not his friends, but his servants. When he finally gets the chance to play with his siblings, he experiences what it feels like to be just a child. They have the opportunity for inhibited playtime, away from adults, unconcerned with rituals and rules. He is clearly happy at this moment, getting "so carried away that we were laughing and shouting." That is not something that happens often for P'u Yi, so much so that this moment left quite an impression.