The party holding the white flag will send a military envoy, trumpeter, flag bearer and interpreter to the other party's headquarters to explain the conditions or intentions. Soldiers enjoy the inviolable right from displaying the white flag to returning to their side. In the negotiation, neither side can attack the other. As time goes by, people gradually regard the white flag flying in the war as surrender. Later, the white flag became a symbol of "surrender" and has been used ever since.
1. The symbol of white surrender originated in the Qin Dynasty. At that time, Qin people used black as the "national color" to represent victory (reason: Qin people thought that the five elements belonged to water and water was black). At the end of Qin Dynasty, Liu Bang captured Guanzhong and directly threatened Xianyang, so Ying surrendered, using white as the "national color" of Qin people as a costume to surrender (his mood can be imagined). This is the origin of China's "surrender color".
2. The symbol of the West stems from their perceptual knowledge of white-whiteness-nothing-complete failure.
This origin is just a cultural prejudice. Before that, the surrenders just casually expressed the meaning of disarmament, and the surrenders only understood and distinguished the surrenders and the recalcitrants through perception.
There is also a saying that artificial colors appeared relatively late, so white cloth was the easiest to obtain in ancient times.
In addition, raising a white flag also means that the other party can draw its own flag, thus representing surrender.