The Emperor's Beloved: My Ancestor is the Crown Prince?

Four-year-old Qingyi has a problem: she's the "fattest" child in the family. After being "forced" to go for a morning run by her father because of her weight, she decides to complain to the "handsome ancestor" in the ancestral hall!
With her small bag full of lollipops and probiotics on her back, she pushed open the old-fashioned door with all her might—only to find that the world behind the door had completely changed.
A dignified guard, a magnificent palace, and an uncle who calls himself "Duho" staring at her with shock. Dressed in Officer Judy's pajamas, she was treated like a little monster in "strange clothes."
When asked about her parents, she replied in a childish voice, "My dad's name is Li Qi!"
All the officials were speculating about which prince's treasure this chubby, exquisitely beautiful baby was. Only the Crown Prince Li Chengqian, looking at the little dumpling that had appeared out of nowhere and whose features bore a striking resemblance to his own, fell into deep thought.
Meanwhile, Xiao Qingyi, who had successfully gotten her hands on some snacks, licked her fingers contentedly and extended a soul-searching invitation to the most distinguished person in front of her:
"Handsome brother, want some probiotic drinks? They're sweet and sour. I'll share a bottle with you, and you can help me teach Dad a lesson, okay?"