Introduction to Acacia: It is said that Yue Fei went north to fight against the Jin Dynasty, and he was invincible. At that time, the Marshal's Mansion was located in the mosque, and Yue Fei's chrysanthemum horse was tied to an old locust tree in the temple. Yue Fei often walked, boxed, studied the art of war, and held meetings under the tree, forming an indissoluble bond with the locust tree. When Yue Fei was recalled by the gold medal to evacuate, the wind-chasing horse circled the locust tree three times, his hooves leaped into the air, he hissed loudly, and his tears fell loudly. He couldn't bear to leave. At this time, the leaves of the old locust tree poured down one by one like a fountain of tears. The next year Yue Fei was killed in Fengbo Pavilion, the old locust tree shed tears again, gradually withered and died, and was called "Acacia locust tree" by later generations.