Humorously speaking, Ceng Fan can be said as follows:

1. I am a professional eater, and I am good at enjoying other people's food without spending a penny.

2. I have a natural knack for nothing. Whenever and wherever I am, I can always enjoy delicious food inadvertently.

3. I am a doctor of rice, specializing in the discipline of scraping rice, and I can successfully complete the task of free meals every time.