The ink vinegar Yu Xiaoyi drinks is a mixture of ink and vinegar.

Video creator Crooked Chef Yu Xiao Er Yu Xiao Er drinks a lot of ink vinegar every time he eats "dark food", presumably to cover up the flavor of the "dark food".

Yu Xiao Er's line "Hello everyone, I am Xiao Er, I am serious about cooking." The addition of "dark cuisine" and ink vinegar makes Yu Xiaoyi's video adhesive, and when one hears Yu Xiaoyi's "Hello everyone, I'm Xiaoyi, I'm serious about cooking," one is reminded of, making "dark cuisine " and drinking ink and vinegar.

Crooked cook Yu Xiao Er's secret condiment is ink vinegar.

Ink vinegar is Yu Xiaoyi's secret drink that can be eaten, ink vinegar is not vinegar is just the name he gave to this drink.

Yu Xiaoyi is a short video blogger who makes dark dishes with strange ingredients, all of which he chooses to use in his eye-catching and innovative ways, adding ink vinegar to whatever ingredients he uses.