Who designed the slogan "unique dry fried beef river"

In the The Knockout TV series 16, in the police exercise, the password given to the hostages is dry-fried Niuhe, which is a unique password designed by the male host An Xin.

The Knockout tells the story of a 20-year life-and-death struggle between the righteous forces and the evil forces represented by An Xin, a frontline policeman. Through group narration, he showed the black-and-white contest and complex humanity in the anti-gang action.