Crocker provided a large number of veal pies to the society, which changed the eating habits of Americans. He started to run McDonald's company from 1955, and gradually made McDonald's all over the world. By 1983, McDonald's sales have reached $8 billion.

In fact, McDonald's was originally founded by two gentlemen named McDonald's. They are brothers. My brother's name is Morris McDonald and my brother's name is Richard McDonald. They opened the world's first McDonald's in Los Angeles on 1930. However, the father of McDonald's who made McDonald's "big" was Crocker.

Crocker used to be a salesman of milkshake machines. 1955, by chance, he found that a restaurant named McDonald's ordered eight milkshake machines from their company at one go (usually only one or two are bought in the store at most). Curious Crocker went to Los Angeles to visit this amazing restaurant. He went to the McDonald's brothers, the owner of this restaurant, and told them the idea that McDonald's is everywhere. However, the McDonald's restaurant without semicolons can earn 10 million dollars a year, which makes the McDonald's brothers very satisfied and doesn't want to accept Crocker's crazy suggestion at all. Crocker didn't give up. Finally, the McDonald brothers finally promised Crocker to help them sell the franchise of McDonald's chain stores.

Although the McDonald's restaurant with "only one restaurant and no semicolon" is quite successful, it is not easy to become a chain store. Crocker must build this system step by step. According to the terms of the contract, Crocker also pays the operating expenses and marketing expenses of the chain store, which is very difficult for Crocker, who only jumped ship in his fifties. His wife also ended her 39-year marriage with him because she couldn't stand such a change. At this time, the McDonald's brothers secretly sold the franchise to Crocker's rival in the mall, which made Crocker very angry. So he borrowed $2.7 million from some school funds and retirement funds, bought out all the trademarks of McDonald's and drove the McDonald's brothers away. Since then, he has become a veritable father of McDonald's. Since then, McDonald's performance has soared. By the tenth anniversary of Crocker Company, there were more than 700 McDonald's hamburger restaurants in the United States, and McDonald's shares were listed and became active stocks. Crocker also opened tens of thousands of McDonald's burgers around the world, creating countless fast food miracles, making McDonald's a world-recognized symbol of American culture. A year after Crocker's death, McDonald's was included in the Dow Jones Industrial Index by the new york Stock Exchange. At this time, McDonald's has become a giant of American enterprises.