But I think the practice should be similar to that in hotels.

First, you cook a certain amount of rice porridge with water and rice (it takes a long time to cook).

Then put your cooked rice porridge in a small pot. Cook it again. After boiling, add your favorite ingredients (shredded ginger, preserved eggs, lean meat ...). Finally, add onion and salt.

That's what I did when I was working in a hotel. I think it should be like this.