More than 100 years ago, there was a man named John Stice Pemberton in the United States. He was the boss of a pharmaceutical company. He has a hobby and likes to play with distillers and various potions in the laboratory. He always wants to create a medicinal syrup that can refresh himself, relieve fatigue, and cure headaches. One day in May 1886, Pemberton went into the laboratory early in the morning as usual. He redesigned the formula based on summarizing past experience. First mix several medicinal syrups that can refresh, quench thirst, and clear the mind, put them into a large container, and add some medicinal syrups extracted from kola nuts, coca leaves, and a South American plant, and then Add a little caffeine, sugar, and phosphoric acid, stir and mix, and find that the mixture takes on an attractive dark green color. It tasted quite good at first taste. This was the earliest "Coca-Cola" drink prepared.

Now, Coca-Cola has become one of the most popular drinks in the world, with hundreds of millions of bottles of Coca-Cola consumed every day around the world. However, the formula of Coca-Cola is kept secret and is kept in a safe deposit box in the Bank of America. No more than 10 people in the world know this secret formula. In fact, more than 99% of the ingredients in Coca-Cola are public: sugar, carbonated water, phosphoric acid, caffeine, caramel, and a small amount of substances extracted from coca leaves and kola nuts. It is basically a mixture of several substances, perhaps involving very complex chemical reactions. The content of the mysterious ingredient "Goods 7x" in Coca-Cola is less than 1%. However, in order to analyze this mysterious "7x", many chemists and competitors used the most advanced chemical analysis instruments and spent more than 80 years. No definite conclusion has been drawn and it remains an unsolved mystery so far.