1. Prepare all the materials; 2. Add white sugar and lemon juice into the egg yolk and beat it until it is light yellow with electric egg beater; 3. Pour the milk into the pot and cook it until bubbles appear; 4. Pour the heated milk into the egg yolk paste and stir it quickly; 5. Pour the egg yolk paste evenly into the pot and cook it until it is thick, and let it cool for later use. 6. Pour the egg yolk paste into the pot and cook until it is thick, and let it cool for later use. 7. Send the whipped cream to 9 for distribution. 8. Pour the ice cream into the chocolate paste, kiwi paste and mango paste respectively. 9. Stir well and refrigerate for more than 4 hours.