If it's cooking, drying noodles or wrapping jiaozi, just wait until the water boils, then turn off the fire and move the inner pot to the outer pot.
If it is soup and porridge, boil it for 1-2 minutes, then turn off the fire and move the inner pot into the outer pot with heat preservation.
If it's stew, it usually takes 2-3 minutes to turn off the fire, and the inner pot can be moved into the outer pot to keep warm.
If it is steamed rice, etc. , bring the water to a boil for 1-3 minutes, then turn off the fire and move the inner pot into the insulated outer pot.