What is the name of the flag inserted on the back of a Beijing opera martial artist?

In Beijing opera, the flag inserted on the back of martial artists is called "leaning on the flag", which is one of the important costumes of military commanders in traditional Chinese opera. Four triangular colored flags are inserted behind the head of the character (fixed on the shoulder) and painted with grass dragons, river cliffs or dragons. Its main function is to belong to freehand brushwork art, relying on flags to represent the standard and symbolize generals, and the stage can not accommodate thousands of troops. The confrontation between the two military commanders shows that the two armies are fighting fiercely ... The modern relying flag is only a purely decorative dance tool, and it is a special dance tool to show the prestige of military commanders, show the skills of performers, and increase the dynamic beauty of dancing, thus helping to shape the characters. It has lost its former meaning.

In fact, this dependence on flags played a practical role in ancient wars. Soldiers tied flags on their backs and killed the enemy, which not only hindered the battle but also clearly distinguished the enemy from me. It also played a very important role in improving morale. In large-scale battles, relying on the distribution of flags is beneficial for commanders to observe the battlefield situation. In addition, relying on flags also has the function of protecting soldiers from being cut by the back in melee. It was often used in wars before the Tang Dynasty. Manchu soldiers in Qing dynasty used cotton armour of various colors, so they relied on flags to warn them.