Self-made sour cucumber Flammulina velutipes spinach soup and sour cucumber Flammulina velutipes spinach soup are soft, tender, delicious and fresh, and rich in vitamin C, carotene, protein, iron, calcium, phosphorus and other minerals. Sour cucumber, Flammulina velutipes and Spinach Soup has a high content of protein, many kinds of amino acids and high digestibility. Here's how to share the sour cucumber, Flammulina velutipes and Spinach Soup: