This can be divided as follows: flour feels sticky when it is slightly watered (cold water). You can take three appropriate containers and put cold water in them first, only 50 to 100 ml is enough. You can put these three kinds of flour in each container with about half an egg yolk, then stir them, and let them stand for about 3 to 5 minutes after stirring.

When mixing flour, you can use cold water or hot water according to your needs. Generally speaking, when mixing flour, add cold water. If you add a little salt and beat eggs (the amount depends on the amount of flour), the noodles will somersault (toughness); Starch is generally used for cooking, and cold water should be put when it is used; When making rice noodles and dough, if you are making dumplings, you should use boiled water to make dough, otherwise you can't make dumplings, even if you rub them out, they will melt in one pot; Starch, like rice flour, must be washed with boiling water if it is directly used for cooking. As for corn flour and other powders, as long as they are not sticky when mixed with cold water, they should be mixed with boiling water.