Most merchants selling yam noodles are regular manufacturers and farmers' own yam powder, which is of good quality and more comfortable to eat.

Yam vermicelli refers to a kind of powdery food made of yam after processing. Its taste is smooth, nutritious and widely eaten. Yam vermicelli contains many nutrients needed by human body, such as starch, protein, fat, cellulose and vitamins. Has the effects of invigorating spleen, regulating stomach, promoting digestion, nourishing kidney and essence, benefiting lung and relieving cough, lowering blood sugar and prolonging life.