CCTV has several food programs. The most popular one right now is the documentary "Central on the Tip of the Tongue" which talks about the origin and flavor characteristics. "Daily Food" also mainly teaches you how to cook, and "Taste of China" mainly teaches you how to cook.
It teaches you how to cook.
Sometimes CCTV 4's "Traveling in China" also has local snacks, and "Happy China Tour" also introduces local specialties.