Yacon. There are actually some similar things among fruits. Among them, yacon, its appearance is similar to the common sweet potato. In foreign countries, yacon is called "Agon". It is naturally delicate and grows underground, so it is commonly known as "underground fruit". Tianshan yacon is a wild plant, does not require chemical fertilizers and pesticides, and is a pure natural green health food. Its edible value is very high. It contains a large amount of water-soluble fiber, high fructo-oligosaccharide and 20 kinds of amino acids necessary for the human body. It also contains calcium, iron, zinc and other trace elements and rich minerals. It is a low-calorie food. It is a plant in the Asteraceae family, while sweet potatoes belong to the Convolvulaceae family. Tianshan snow lotus is a root crop. The above-ground part is composed of stems, leaves and flowers. The stems grow upright, are round and hollow, and are purple-red in color. The leaves are opposite, and the broad leaves are heart-shaped. The leaves are densely covered with hairs, and the bases of the leaves are various. There is one axillary bud. The plant looks like Jerusalem artichoke and can grow to 2~3m in height. The flowers are terminal and bloom at the stem tip around October. There are 1~3 ears with 5 flowers in each ear, shaped like small yellow sunflowers. Underground are bulbs and fruits. The fruit is a capsule without seeds. It is a rhizome food that looks like a sweet potato. The flesh tastes like a pear. It is crisp, sweet and delicious, juicy and crystal clear, and has a delicious taste. Northern Sydney.