The fruit of cocoa tree was eaten by Olmec Indians in South and Central America for a long time before it was introduced to Europe. The Olmec Indians first used the word "cocoa". Maya Indians further cultivated cocoa trees in agriculture and produced the first cocoa drink. The Aztecs believed that it was their quetzalcoatl who gave cocoa beans to mankind. Aztecs believe in cocoa beans, which are used for religious ceremonies and as gifts from the gods. But it is an integral part of Aztec daily life, and it is used as currency in circulation. But only nobles and warriors can eat it. Chocolate, which is eaten for the first time by human beings, is a drink with spicy taste and bitter taste. The ancient Aztecs baked cocoa beans and ground them into powder. After mixing them with water and corn flour, they added pepper and blew them into bubbles. This drink is called "Chocolatl L". Montezuma, the Aztec ruler, and his DPRK officials drink 50 cans of chocolate every day. This precious drink, known as the panacea, is contained in a gold goblet that is thrown into the lake only once. The first European to discover chocolate is believed to be Christopher Columbus. After returning from the "New World" in 1502, he introduced chocolate to the court of King Ferdinand. Decades later, Spanish explorer Hernando Kutez discovered cocoa beans from Aztec nobles during his conquest of Mexico. In the 16th century, it was Columbus and Kutez who expanded the influence of chocolate among Spanish nobles, but Princess Maria Salsa of Spain was the one who set off a chocolate craze in Europe. She presented cocoa beans to Louis XIV as an engagement present. Chocolate has been a secret food in Spain for nearly a century. It was only after 1606 that this kind of food became popular in Italy. 1642, chocolate was introduced to France as a medicine and eaten by Catholics. This kind of drink is so popular that the first "chocolate house" was established in 1657, and it became a merchant specializing in providing hot and sweet chocolate for the general public. Chocolate drinks entered the United States in 1765, when the first chocolate factory opened in New England. Even Thomas Jefferson, a recognized gourmet, praised "chocolate has the advantages of health and nutrition". Chocolate has a wide connection with many other famous historical figures. Because Casanova and Madame Dubali believe that chocolate can add romance, chocolate has been promoted to a new height in Europe. 1657, it became more and more fashionable, and many "chocolate houses" were established in Britain to supply chocolate drinks to the public. 1828, Coenraad Van Houten of the Netherlands invented a screw extruder which can extract cocoa butter from cocoa beans. This alkaline processing method of Van Houten (later called "Dutch method") can remove the sour and bitter taste of cocoa and produce softer and sweeter chocolate drinks. Today, cocoa powder processed by alkali is still called Dutch chocolate. Chocolate has always been regarded as a beverage, and it was not until 1847 that chocolate became the solid form we are now familiar with. The inventor successfully produced a chewable chocolate bar by adding cocoa butter to chocolate drinks. Milk chocolate came out in 1876, when Daniel Peter, a Swiss chocolate manufacturer, found that adding milk powder to chocolate could produce softer and lighter chocolate. 19 1 1 year Frank and Ethel Mars began to produce chocolate in Washington State, USA. It was World War I that really stimulated the development of American chocolate industry. The US Army Quartermaster Corps entrusts many American chocolate manufacturers to produce 20-40 pounds of chocolate bars and transport them to the battlefield base. These chocolate bars were cut into small pieces and distributed to American soldiers fighting in Europe. Finally, the task of wrapping chocolate into small pieces fell to the producer.