The ancestors of giant pandas are carnivores. How can they change from carnivores to vegetarians now? This is related to the change of their living environment. After the glacier attack, the giant pandas left in Sichuan and Gansu can only survive by gradually changing their eating habits. As a result of the panda's long-term adaptation to the environment, it changed from eating meat to eating bamboo, and its molars became particularly wide, suitable for grinding bamboo fiber. Giant pandas like to eat cold arrow bamboo, ink bamboo, water bamboo, especially bamboo shoots. I go somewhere to eat bamboo shoots on time every year. Giant pandas eat a lot, eating about 20 kilograms of tender bamboo every day and absorbing nutrients from a lot of fiber. Because it digests a lot of fiber and lignin every day, it especially likes drinking water. Of course, pandas occasionally eat other small animals. If it sees a bamboo rat, slap it to death and have a good meal. Panda's usual life, except eating, is sleeping, and when he wakes up, he begins to eat again. Sometimes I go to the stream for a drink. The giant pandas in the world are only produced in China, and only distributed in the mountainous areas of Sichuan and Shaanxi provinces in China, so they are extremely precious and known as "national treasures". Because bamboo has ups and downs, it will only bloom once every 50 to 60 years, and then it will die. At this time, the giant panda is short of food and its life is threatened. At present, China has established a giant panda reserve, organized large-scale rescue activities for giant pandas, and carried out artificial breeding to make this "national treasure" last forever.