Hong Tong Sophora japonica hits three numbers.

Each city has its own landmark attractions and buildings. For example, when it comes to Beijing, people will think of Tiananmen Square. When Changsha is mentioned, people will think of Orange Island. These landmark buildings can also make local people proud when promoting their hometown. When Shanxi people talk about the symbol of their hometown, they often talk about the big locust tree in Hongdong, Shanxi. This big pagoda tree has a long history and left many legends. What is the origin of this ancient pagoda tree? As the name suggests, the Sophora japonica in Hongtong County, Shanxi Province. There is a Guangji Temple in this county, which was built in the Tang Dynasty. At that time, the temple was very popular, and it was packed with people's prayers. Next to the temple, an ancient pagoda tree stands upright. This pagoda tree is older than the temple. It began to sprout in the Han Dynasty. Because of its long history, this ancient pagoda tree has become a landmark building in China. During the Ming dynasty, there was a huge wave of immigrants, and the beginning of this immigration was the Guangji Temple area where this big pagoda tree was located. Speaking of great migration, this great migration in Ming Dynasty should be regarded as the fourth great migration in history. Many books have recorded this kind of migration, and recorded the number of migration in detail. It is understood that the Ming Dynasty organized 18 immigrants, mainly during the Hongwu and Yongle periods.

Perhaps many people have questions, why do people come to Hongdong to gather immigrants? In fact, because Hongdong was a prosperous area in the Ming Dynasty, the traffic was very convenient, and there were ancient post roads in all directions. Therefore, the Ming government was the first choice when choosing areas where immigrants concentrated.

In many poems, "Acorus calamus" and "willow leaves" are used to express the sad atmosphere of farewell, while Sophora japonica is defined as a symbol of homesickness after the Ming Dynasty. Because in the Ming Dynasty, when the migrating people bid farewell to their hometown in tears, the last scene they saw was the wanton growth of Sophora japonica. Since then, whenever they think of their hometown, an unforgettable sight of locust trees will appear in their minds.