KFC is an American multinational chain restaurant, and the second largest fast food and the largest fried chicken chain enterprise in the world. It was founded by Colonel Harland Sanders in Louisville, Kentucky on 1939.

KFC mainly sells fried chicken and other fast food, and its business philosophy is to constantly introduce new products or repackage the products previously sold, aiming at people's early adopters' mentality and making profits.

KFC now belongs to Yum! Brand, and formed a strategic alliance with Pepsi-Cola, regularly selling carbonated drinks provided by Pepsi-Cola (except for some countries, such as South Korea and Japan).

The logo of KFC has undergone six revisions since the birth of 1952, with the latest revision in 2006. Every modification of KFC logo is gradual according to the development of the times and the change of aesthetic trend, but it always retains the image of a white-haired and amiable grandfather, and its position and size in the logo are becoming more and more prominent, gradually becoming the most distinctive feature of KFC logo design.

Grandpa's image has been preserved, on the one hand, because it is a brand visual symbol formed over the years. If it is deleted rashly, it will have an unpredictable impact on the public impression of the brand. On the other hand, the white-haired grandfather in the logo is Colonel Sanders, the founder of KFC.