The soup became a part of Teochew cuisine, and its recipe evolved over time. Although the Chinese since the Ming dynasty commonly use sweet potato leaves, other varieties include amaranth, spinach, ipomoea aquatica and other leafy greens; and alternative broths such as beef or chicken. Other ingredients are often added such as beaten eggs, shredded dry cured ham, tofu, cellophane noodles, etc. Guangdong Province's restaurants routinely decorate the soup in a taijitu diagram. However, the most authentic version of the soup typically is homemade and simply prepared just using leaf vegetable, edible mushrooms, and vegetable broth.
