One of the specialty snacks in the northwest of Tianyi is made with oats or green grass. In Xining, the ancient city of Qinghai Plateau and various towns in the agricultural area, you can see the unique folk snack "sweet grass". Sweet grass is a flavor snack processed from Qinghai-Tibet Plateau cold-resistant and early ripening grain. There was a saying in the crowd: "Sweet, sweet, old doll mouthing, a bowl of two bowls can be appetizing, three bowls of four bowls of top meal."