Introduce four famous foods in China: shark's fin, bird's nest, sea cucumber and abalone.

Women who often eat bird's nest can maintain their skin, making it moist, smooth and elastic, which is also the secret for many Hong Kong stars to keep their faces bright when eating bird's nest.

The Compendium of Public Materia Medica says that bird's nest "can make the golden water grow together, and the kidney qi can nourish the lung and stomach qi, and direct food is the best". Therefore, it has the functions of moistening lung, benefiting qi and strengthening spleen. Long-term consumption can make people energetic, not weak, and can increase physical strength and physique.

Pregnant women need nutritional subsidies most during pregnancy. In Singapore, more than half of pregnant women eat bird's nest. Because bird's nest is rich in active protein, it can promote the growth of human tissues and improve immunity. Eating bird's nest by pregnant women can make future newborn babies stronger, whiter and more resistant. For pregnant women, bird's nest tonic can moisten the lungs and relieve cough, and replenish the middle and qi.

Old people generally have a bad stomach and weak body, or osteoporosis and arthritis.

Smokers smoking will lead to dry throat and excessive phlegm, and may cause bronchitis, emphysema, lung cancer and other diseases. Bird's nest contains polysaccharides, antibodies and vitamins. Long-term consumption of bird's nest can enhance the immune system, moisten the lungs, resolve phlegm and relieve cough.