She picked up the soup bowl and blew it, then stirred it with a spoon, took a spoonful and tasted it herself: "The temperature is just right, it's ready to drink."
She didn't even realize that this kind of behavior requires a close relationship, so she sent the soup she drank to Young Master Qin anyway.
First young master Qin didn't dislike that this bowl of soup was eaten by Ji Rou, and there might even be her saliva on the spoon, so he picked up the bowl and drank the soup slowly.