According to the number of bird's nest impurities to classify the bird's nest: Guan Yan, Mao Yan and Cao Yan.
Guan Yan: After the Ming Dynasty Zheng He went to the Western Ocean, he brought back the bird's nest to the court. This tribute-grade bird's nest became a treasure gift among officialdom, so it was called "guanyan", also known as "gongyan" and "baiyan". The bird's nest, which can be called Guan Yan, is of good quality and small in quantity and is a top bird's nest. The official swiftlet is a swiftlet nest with a white-nest nest, a smooth body, and a cup-shaped or semi-bowl shape. The average nest is 30-50mm thick, 5-10cm long, and 4-8cm wide. Each weight is approximately 7-12 grams. Guan Yan made big heads, high-quality Guan Yan can reach 8-10 times.
Mao Yan: Mao Yan is swallows to use saliva to mix their own feathers to build nests, so Mao Yan has more feathers and other impurities.
Grass Yan: Grass Yan is a swallow that can survive in various environments and build nests. They use straw to mix their own saliva to build nests. Grass Yan is cheaper, and most of the ready-to-eat bird's nests in the market are made from grass yan.
According to the color of bird's nest, it can be divided into Bai Yan, Huang Yan and Blood Yan.
The food eaten by swiftlets is different from the color of the swallow nests it produces. By color, it can be divided into Bai Yan, Huang Yan, and Blood Yan.
Bai Yan: The white color of bird's nest is Bai Yan. Bai Yan nest is not fire-resistant, can not be stewed too long, otherwise it will melt. House Yan and Dongyan are different, house Yan is not fire-resistant. The texture of the Dongyan is relatively solid and its head is even larger. The stewed top grade Dongyan has a delicious, smooth and refreshing taste.
Huang Yan: Huang Yan is generally gray-yellow or yellowish-brown, because swallows spit out saliva that contains very strong gels and turns yellowish after air oxidation. Unscrupulous traders will use syrup to dye the bird's nest or yellow the bird's nest under the sun's exposure to impersonate Huang Yan.
Blood Swallow: Blood Swallow is a nest from the swiftlets built on the rock wall of the cave. There are three main causes of the color of the nest: First, the swiftlets eat seaweed algae, deep mountain insects and other flying ants, so their saliva contains minerals. More often than not, the nest is easily oxidized to red. Second, the minerals contained in the 10,000-year-old rock wall slowly penetrate into the nest through the contact surface between the nest and the rock wall. Changes in color; Third, the air inside the cave is very sweltering, and the deeper it gets into the cave, the hotter it is. The bird's nest containing minerals is oxidized by the hot air and turned into a grayish red or reddish color. Note that blood swallows are not bright red, they are red or gray red, and the bright red blood swallows on the market are smoked. Natural blood swallows are not as bright and red as dry. Blood Yan Huang Yan can only come from Dong Yan, and only comes from caves in Sabah, Indonesia, and caves in Borneo. There is still no new technology to allow house swallows to produce bloody swallows. Many local people inside their own swiftlet house used shards of wood that had been soaked in medicine to build swiftlet nests. The nest built on this wood soon chemically turned red.
According to the nesting site, the type of bird's nest can be divided into hole swallow and house swallow.
Dongyan: Dongyan is a natural bird's nest from cliffs, caves, caves, and cliffs. Dongyan is affected by the natural climate and natural environment. The texture is firm and dark in color. It is mostly beige or tan. The appearance is not good, the fine hair is more, the absorption of minerals is also particularly large, the head is large, and the time of dipping and stewing Longer and refreshing.
House yan: House yan is the bird's nest nested in the house. The house yan is picked in the swallow house. The swiftlets are still wild. They go out to eat in the morning and return in the evening. Because the habitat is good, there are fewer impurities in the bird's nest and the shape of the bird's nest is relatively complete.
The characteristics of the House Swallow are high quality, low hairiness and smooth mouthfeel, and it swells a lot in the water (commonly known as the originator), with an average head size of five to seven times. The Baiyan oysters are relatively slippery, but not fire-resistant, so they can be eaten within 30 to 45 minutes. If the stewing time is too long (more than one to two hours, the bird's nest will dissolve in water and disappear).
Dong Yan is picking in caves and is gradually being replaced by House Yan because of sparse production and increasing environmental protection. The house yan is picked in the swallow house. The swiftlets are still wild. They go out to eat in the morning and return in the evening.
The texture and appearance of the bird's nest can be divided into nests, swallows, swallows, swallows, and horns.
Yanji is the best in terms of nutritional value, taste, quality, hair and appearance. Magazines are few and relatively clean. Yanyan is taken out naturally, so the shape will vary in size. Mao Yan and Caoyan have more impurities and feathers, or they need to be removed to remove feathers and impurities, and they will be sold as swallow-strips or scallops, or into different shapes of yam cakes. These scallops, scallops, and scallops are processed more often and have lower nutritional values ​​than scallions. Yanjiao is a hard part of both ends of a bird's nest. It is the root part of the wall that sticks to the wall of the swiftlets. It has a fragrant mouthfeel and a more refreshing taste. It takes a longer time (6 to 8 hours) to dip the swiftlet. Come out and soak it separately.
Bird's nest quality level
The bird's nest picking period is generally three months. The first phase of the nest is headed for about the first time in each January to April, and is later called the second phase and the third phase. During the first period of bird's nest, it is rich in rain, suitable for reproduction of microscopic plants and animals. The swiftlets have ample food and the body is particularly strong. Its saliva secretion is also particularly developed, and its impurities are particularly small. The most valuable. As for the second period, the Swallows built their nests for the second time. The locals began to enter the dry season. The swiftlet's food source was reduced. The nests built were relatively thin and the lines were not so thin and dense. The shape and head were not as good as the heads. period. The next third period, when it has entered a severe drought, the swiftlet secretion of the swiftlet is slow and the feathers are easy to fall off. The impurities will be more, the shape of the beak is smaller, and the head is also worse. All head yan are better than the second yan, and the second yan is better than the third yan.
In China, due to the special reasons of the bird's nest industry, it is difficult to implement uniform standards. Therefore, the government departments still do not specify relevant industry standards to regulate the operation behavior of bird's nest merchants and the bird's nest products, including the bird's nest quality standards and grades. The classification of the bird's nest on the market is a standard set by the company itself. It is not an industry standard. Therefore, among different companies, the level of bird's nest will be different.
The bird's nest is generally divided according to the “density, fineness, sparseness†and ç› shape of the bird's nest. The denser, ç›-shaped symmetry is divided into top nests, while the sparse ones are inferior. According to the order of the price, Yanyan is the leader, and the swallow is the second, the swallow cake, and the swallow ball are determined by the quality, and then the swallow is broken by the swallow. According to the efficacy, the better the quality, the higher the nutrient composition and the more significant the effect. According to the point of origin, it means that after the bird's nest is soaked, the moisture content is several times the original weight, and the good bird's nest head can reach 8-10 times.
Details of each level of bird's nest:
ã€Dong Baiyan】 Picking in the cave, the shape of the dragonfly is relatively complete, less plump, yellowish, and difficult to infuse.
ã€Princess Baiyan】 Full-bodied, full-bodied, bright and translucent, is the first nest constructed by the swiftlets.
[First Class Bai Yan] The cricket shape is more complete, fuller, whiter, and clearer.
ã€Second Class Bai Yan】 The cricket shape is not complete with a few cracks, fuller, and whiter.
[First Class Bai Yan] Bai Yan ç› ç› ç› ç› æˆ– 或 或 或 或 或 或 或 或 或 或 或 或 或 或.
The second class of white swallows is the smaller bar formed by the Baiyan pecking or crushed in transport.
ã€Triangle Baiyan】 The swiftlets nest a nest of white triangles formed in the corner.
Bai Yanjiao The swiftlet is rich in texture when it is nested on the base of the wall.
ã€BaiYan.com】 The delicate mesh of eggs and Xiaoyan is supported by the middle of the bird's nest, and it is delicately lubricated.
ã€Breed Bai Yan】 Bai Yan ç› ç› ç› ç› ç› ç› ç› ç› ç› ç› ç› ç› ã€‚ 。 。 。 。
[With Mao Baiyan] The cricket shape is relatively complete, fuller, and with some of Yan Yan's hair.
ã€Yan Yan】Bai Yan is processed and made of many dongyan and mao yan. It has a harder texture and a longer dipped time.
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