Who doesn’t follow diplomatic protocol?

Looking at the process, Blinken and Sullivan each spent less than 2.5 minutes on their opening remarks. Yang Jiechi, however, spent more than 16 minutes cursing the U.S., not allowing the interpreter to interject throughout. He then spent more than 3 minutes to add to his remarks, and Wang Yi spent another 4 minutes to fill in the blanks

Blinken left the reporters behind, and Sullivan spent less than 2.5 minutes each to add to his remarks, but Yang Jiechi criticized him for “not following basic diplomatic etiquette”.

Is this really the case ?