The beating is the part of Red Cliffs most often mistaken for fact. Huang Gai is flogged until the skin breaks, then sends a letter of surrender. Cao Cao trusts the old officer who has been publicly shamed. The fire ships can therefore come in close.
The biographies of Zhou Yu and Huang Gai tell a plainer sequence. Huang Gai tells Zhou Yu that a long standoff favors the larger army and that fire can be used. Zhou Yu agrees. Huang Gai prepares the covered boats and drives them into the fleet. There is no prior compact to stage a beating, and no letter written in blood for Cao Cao to misread.
The success of the fire belongs to the battle. The self-injury plot is marked as romance so that a scene of punishment does not replace Huang Gai’s counsel. “One was willing to beat, one was willing to be beaten” is a storyteller’s rhythm, not an order from 208.