Stir-frying, boiling and frying have been around since the Zhou Dynasty. . . The earliest document that recorded this speculation was Qi Yao Min Shu in the Southern and Northern Dynasties. . . Before the iron pot appeared, it could be used for cooking. . . Edible oil was recorded in Shang and Zhou Dynasties. . . Previously, the text had not been unearthed. . . Ointment (Yueshu) (Yuejun) is animal oil. . . The earliest oil extraction was sesame oil. . . It became popular around the Jin Dynasty. . . I don't know if anyone ate the oil extracted from flax tree and put it on their clothes. . . I used to eat too much. . . The most famous recipe is Zhou Bazhen. . . Beef is always edible. . . Just can't kill cattle without permission. . . In addition, the people did not strictly prohibit cattle raising. . . The strictest is Song Qing. . . But the Song Dynasty still collected beef tax. . . China has been planting rice on a large scale for more than 6,000 years. . . And it is one of the five grains. . . Rice is also the earliest way to eat in China. . . China also produces many fruits, such as peaches, plums, apricots, cherries and papaya. . . There are apples in China. . . Just apples and pears. . .