Among many counties in China, the most famous one is probably Hongtong County. The reason why Hongdong County is famous is firstly because of the sad singing voice of a brothel woman who is born with a difficult posture: "Su San left Hongdong County ... Peking Opera is a national quintessence, and fans will hum a few words of" Jade Tang Chun "when they are interested. Those bad people occasionally turn on TV and radio, and maybe a Susan will jump into their eyes or ears, so "Hong Dong" is deeply embedded in the memory of China people. Nowadays, the famous locust tree in Hongdong has made hundreds of millions of Chinese descendants have the urge to go home. They came all the way to this place closest to their ancestors to pay homage to their parents' long-cherished wish and to worship that day 600 years ago. At that time, the ancestors shed tears under the big locust tree; Today, future generations are happy in front of the ancient tree, gathering together to review the past and look forward to the future. Sophora japonica is always associated with compatriots at home and abroad and is a soul mate. Precision and virtue have both left, and they can't give up their deep nostalgia. Many suffering immigrants bid farewell to the ancient Huai River with enthusiasm, leaving behind the thick yellow land of Xingfengwo, the fertile and healthy land of Shen Yuan, the ferry by the Fenshui River, the humming of cranes lingering in Huaiyuan Garden, and the deep dream of remembering their hometown. There is a saying in China that when two people meet and exchange names, they will casually say, "Five hundred years ago, it was a family." This allusion should start from the migration of Sophora japonica in Hongdong in the early Ming Dynasty. From the early Ming dynasty to the late Qing dynasty and the early Republic of China, the time is about 500 years. The descendants of locust tree immigrants have already spread all over China and even overseas.