The chain brands include KFC, McDonald's and Pizza Hut.

1. KFC: As one of the largest fast food chain brands in the world, KFC mainly produces fried chicken, which has a wide popularity and influence in the world.

2. McDonald's: It is one of the largest fast food chain brands in the world, mainly producing hamburgers, French fries and drinks, and it is also one of the most famous catering brands in the world.

2. Pizza Hut: It is an international chain restaurant brand with pizza as its main product, featuring high-quality pizza and Italian cuisine.