Zhu Lexian, producer of the show, themed "Morning, World" for the fourth season, says that the documentary series is an insight into the changing of the times and resonates with the current mood.

"Wang and his crew can showcase the characteristics of local people through local food," he says. "They have this sensibility to notice the changing times and present some meaning to life."

Compared with lunch and dinner, Zhu believes that breakfast has a stronger place in society, and that the memory of breakfast is always linked to hometown and a familiar neighborhood.

"The breakfast store owners are also the chefs and servers at the restaurant. Compared with the excellent cooking skills of the chefs at other types of restaurant, their hard work in the early morning is one key element of their delicious food," Zhu says.

In the selection of the places, Zhu adds, he hopes that big cities and small towns can both be included. "The important thing is to be able to present the most characteristic local breakfast."