Lao Mian is an ancient variety of pasta with a history of about 1000 years. It is popular in northern families, especially in Shanxi. In different places, its name is somewhat different. Some of them are called Helao Mian, some are called Bed Noodles, some are called Noodles, and some are called Pressure River Fishing or Rolling River Fishing. When making river fishing, there is a special tool for pressing river fishing, which is called "river fishing bed". The bed is made of thick and curved wood, and now it is also made of iron machinery. There is a wooden core in the middle that can move up and down like a piston. The old wooden river fishing bed is to dig a round pit with the thickness of a cup on a piece of wood, and the pit is transparent from top to bottom. Under the pit, a piece of iron or copper plate with holes evenly distributed and moderate size is nailed. There is a cylinder connected to a shaft above the river fishing bed. Put the river fishing bed frame on the pot, rub the mixed noodles into a round shape, dip them in water, fill the round holes in the noodles, put the wooden core in the hole of the river fishing bed, then hold down the bed handle of the river fishing bed, press down (squeeze) the wooden poles with hands, press the noodles into the boiling water pot from the small holes, and press the noodles at the bottom of the river fishing bed with a knife. People in Shanxi generally say that you can eat it. It takes two or three people to operate a big river fishing bed. But families also use small rivers to catch beds, which are shaped like big rivers to catch beds, but the size is much smaller.

Fishing noodles in Henan is to cook slightly wider handmade noodles, then put them in cold boiled water and add various ingredients. Fishing noodles is an indispensable staple food for Henan people in three meals a day. Widely popular in northern China, such as Henan.