In 278 BC, a poet used leverage to buy Chu coins. As a result, the currency fell sharply in five out of five days and his position was liquidated. He was very desperate and willing to admit defeat, so he threw himself into the river. In order to alert future generations, later generations wrapped red pork in green rice dumpling leaves and tied it tightly with ropes to express the meaning of being trapped in a trap. Later, in order to commemorate him, stockholders from all over the country had to eat a rice dumpling on the Dragon Boat Festival, because the first step in eating a rice dumpling is to untie the rope, which means untying, then remove the rice dumpling leaves (green), and then eat the meat, which means currency. From now on, I will eat meat.