You Double Dipped the Pizza!
We have a few questions here. First of all, this person claimed their friend worked at a Chinese restaurant. If that was the case, then where did this man get his pizza from? Last we heard, pizza isn’t Chinese food. What, is the OP going to try and convince us that baozi is Italian?
But we’ll give the OP the benefit of the doubt since there’s a bigger problem on hand. The pizza-eating guest at this Chinese restaurant (doesn’t make sense, does it?) dipped his slice in a bowl of wonton soup. Not just any bowl, the bowl that customers get their soup from. Even single-dipping your cheese and tomato sauce pizza in wonton soup is bad enough!