It is best to use warm water for making noodles. But different pastas and personal preferences may have different preferences.

1. Knead the dough with warm water: Use warm water when kneading the dough, so that the dough will be soft and elastic.

2. Knead the noodles with cold water: If the water is too cold, the noodles will become hard.

3. If the hot water and pasta water are too hot, the noodles will be cooked.

4. It is best to use warm water. After the noodles are mixed, let it sit for 30 minutes. This process is commonly known as "waking up" in the north. The purpose is to allow the flour to fully and evenly absorb water. If you bake the dough immediately after mixing it, the baked cake will have lumps.

5. Using hot water to knead the noodles refers to pasta that requires cooked noodles, such as steamed dumplings, and requires hot water to knead the noodles.

6. Dumplings and wonton noodles must be made with cold water. The dough should be moderately soft and hard. The more you knead it, the softer it becomes, making it very easy to make. If you use hot water, the dough will become harder as you knead it. Not only will the dumplings be difficult to knead, but it will also be difficult to digest after eating.