The yellow surface is as thin as a dragon's whisker, and it is as long as a gold thread. It is flexible and resistant to tension, and it can be used for soup or food. The process of making yellow noodles is extremely demanding and the operation is very difficult. I saw the noodle master dancing a small yellow dough in his hands, sometimes stretching into a strip, and sometimes rotating into a twist, like a trick, pulling a dough weighing five or six pounds into a thin fan-like noodle. The yellow-yellow silky yellow crystal that is cooked in the pot is bright and can be mixed with hot vegetables. It tastes appetizing and greasy, clearing away heat and annoying, increasing appetite. There are vivid scenes of making yellow faces on the murals of Cave 156 (Song) in Mogao Grottoes, which shows that it has a long history.