My child is not growing and does not eat well, what's going on?

Patient's question:

My baby is now two and a half years old, 88 cm tall, and weighs 23 jin.
They don't eat dinner well either; during naps at night, they always sleep on their stomach. Their buttocks are also very high up.
Their temperament is also quite irritable.
Past treatment history and effectiveness:
No treatment has been administered.
What kind of help do you need:
Is my child normal?

Doctor's answer:

Your baby's weight and height are almost normal. Calculation method for normal height of babies aged 2-12: Age x 775, weight (kg): Age x 28
Advice: Your baby should be fine, but your keen observation needs to be maintained. Correct any bad sleeping posture or unhealthy habits in your baby as soon as possible to avoid future negative effects. I hope my explanation helps you.