Porphyra haitanensis belongs to Rhodophyta, Rhodophyta, Ulva and Ulva. It is a common seaweed, mainly distributed in the coastal areas of Asia, such as China, Japan and South Korea.

The growth environment of laver is very demanding, which requires sufficient sunshine, suitable temperature and rich nutrition. In China, Porphyra mainly grows in the coastal areas of Fujian, Zhejiang and Jiangsu. These areas have good marine ecological environment and clear water quality, which are suitable for the growth of laver.

The morphological characteristics of laver are thin and soft leaves, which are purplish red or dark green. It has high nutritional value and is rich in protein, fat, carbohydrates, vitamins and minerals. Porphyra plays an important role in China's food culture and is known as "the treasure of the sea".

Porphyra selection method

1. Observation color: high-quality laver should be dark green or purplish red with uniform color. If the color of laver is yellow or has other variegated colors, it means that the quality of laver is not good.

2, smell: fresh seaweed should have a fishy smell, if there is no taste or other smell, it means that seaweed may not be fresh.

3, touch texture: high-quality seaweed should feel soft, thin and elastic leaves. If the seaweed feels hard and the leaves are thick or dry, it means that the quality of seaweed is not good.

4. Check impurities: When buying laver, pay attention to check whether there are impurities mixed in. You can gently stir laver to see if there are impurities such as sand and pebbles.

5, pay attention to the shelf life: when buying seaweed, pay attention to check the production date and shelf life. Try to choose fresh laver and avoid buying expired products.