How to make yogurt with yogurt: Prepare ingredients: a yogurt spoon or a pair of chopsticks, several thick porcelain or thick glasses, and a thermometer.

1. First buy a bottle of kefir as a strain. One bottle of yogurt can inoculate five bottles of fresh milk.

2. Prepare a milk pot, a stirring spoon or chopsticks, and several thick porcelain or thick glasses. The above utensils are then steamed and sterilized. Also prepare a thermometer.

3. Heat the fresh milk and boil it for 5 minutes. The boiling time cannot be too short. If you want to eat sweet yogurt, add a certain amount of sugar when boiling.

4. Boiled and sterilized milk is cooled with water or naturally cooled to about 42°C. If you don't have a thermometer, you can touch the outside of the bottle with your hands so that it doesn't get hot.

5. Inoculate with bacteria. Crush the purchased yogurt with sterilized tableware, pour it into the cooled milk, and stir thoroughly.

6. Fill the cup. Dispense the inoculated milk into prepared cups and cover them.

7. Fermentation: Place the cup containing milk at a temperature of 30°C to 35°C for fermentation. It will take about 4-6 hours for the curd to form and then it can be eaten.