“He ordered his troops to shoot weeds, instead of arrows, at a few enemy soldiers. When these soldiers noticed that they were being shot by weeds and left unharmed, they were overjoyed. They promptly ran to Yin Ziqi to report that the Tang army had already run out of arrows. Zhang Xun noticed where the soldiers ran and ordered his best archer, Nan Jiyun, to shoot at Yin Ziqi. One such arrow hit Yin Ziqi in his left eye, throwing the Yan army instantly into chaos. The siege ended with the expected major blow to Yan morale.”

That would be amazing if it actually had happenend.