The Northeast tiger is the largest extant subspecies of the cat family, but also the most powerful predator on land, is the "King of the Beasts" without competition. Male body length of an average of 1.9 meters, body length of more than 3 meters. Northeast tiger (scientific name: Panthera tigris altaica), also known as the Siberian tiger, Amur tiger (Heilongjiang's Russian name for the Amur River), the Ussuri tiger, Manchurian tiger, the Korean tiger, living in Russia's Siberia and the Far East, is the largest sub-species of tigers, was once the largest weight of the feline, the most valuable fur, deservedly called the "king of beasts". "King of the beasts", the male body length can exceed 2 meters, body 260 kg ~ 350 kg (Mazak), which the history of the West Tiger weight measured: male average 330 kg (was the most cited and accepted data), 325 kg, 320 kg and so on several kinds of claims, measurement samples of 9, female average 187.5 kg, measurement sample of 2. Contemporary weights of wild western tigers: males averaged 276.4 kg, with 9 measurement samples, females 317.5 kg, with 13 measurement samples. The most plausible historical records are: 306kg, 320kg, 317.7kg, 349.5kg , 294kg, 290kg, the last two of which are taken as the upper limit of the ecological weight of the tiger. The results of the latest body weight measurement in Russia: 10 female tigers, with an average weight of 189.1kg, an average body length of 173cm, a tail length of 91cm, and an overall body length of 264cm; 12 male tigers, with most of the healthy individuals weighing between 280 and 310kg, with an average average weight of 299.5kg, and a body weight of 287kg, 293kg, 346kg, and 300kg, respectively, 287kg, 293kg, 346kg, 300kg, 279kg, 288kg, 347kg, 270kg, 325kg, 274kg and 355kg respectively. The record weight of the largest individual of the wild Northeast tiger is 384kg, which is included in the book "Mammals of the USSR", and is considered to be the Guinness World Record for the largest wild cat, in addition to 400kg, 390kg, 310kg, 390kg (cited by the authoritative feline scholar Mazak) and other examples of individuals, all of which are included in the various zoological monographs, but the modern Western as well as the Russian However, modern Western and Russian academics have questioned many of these figures, including the record of 384 kilograms, which is considered to be the most unreliable of all. Although these huge individuals have always existed as historical records, they are only among the historical records and are not recognized by modern scientists; furthermore, some hunting records are even more exaggerated, including the 700 kg example that has been mentioned on many websites without any provenance of the measurement, possibly mistaking 700 pounds for kilograms and mistaking the units. The Guinness Book of Records for the weight of a male tiger in captivity is 1,025 pounds (465 kilograms), measured in 1986. More than two decades later, many captive tigers have exceeded this record, including some animal breeding centers and zoos, with detailed reports of instances of 480 kilograms and 499 kilograms, and even a record for a mixed-blooded tiger with an even greater weight of 540 kilograms, which is not authoritatively recognized, and the health of the tiger has not been confirmed. The authenticity of these figures has not been recognized by the authorities, and the health of the tiger has been questioned. The tiger's fur is light yellow in color, thick, and does not fear the cold. According to statistics at present there are about 500 wild, the Chinese government has stipulated strict protection methods, the cattle and sheep by the tiger predation of the farmers state compensation, and legal provisions to prohibit the production and sale of tiger as raw materials of traditional Chinese medicine, such as tiger bone cream, tiger bone wine, etc., blocking the application of the market, but the wild Northeast Tiger is still very rare.