China, the originator of idealism, told his family that he was going to die in his later years. He died the next day after saying this, and this man was Lu Jiuyuan of the Song Dynasty.

Lu Jiuyuan, a famous educator and philosopher in Chinese history and a native of Jiangxi, was the first person to establish the theory of mind and nature in Chinese history. Lu Jiuyuan was as famous as Zhu, a famous neo-Confucian. Together, it is called ibis. Lu Jiuyuan's theory of mind was later carried forward by Wang Yangming in Ming Dynasty, so the theory of mind founded by them was also called Lu Wang School, and Lu Jiuyuan was honored as Lu Zi.

Lu Jiuyuan once preached, taught and dispelled doubts in Longhu Mountain. However, because the shape of Longhu Mountain is very similar to that of an elephant, Longhu Mountain is also called Xiangshan, and Lu Jiuyuan calls himself Xiangshan Weng, while the world calls Lu Jiuyuan Mr. Xiangshan. Lu Jiuyuan preached and taught many times in Xiangshan, that is, Longhu Mountain, so people often come here to visit him.

Lu Jiuyuan thought about the problems of the universe when he was a teenager (about 13 years old). When he was very young (after thinking about the universe), he made a vow to become a saint in Confucianism. Later, Lu Jiuyuan became an official. After becoming an official, Lu Jiuyuan highly praised Wang Anshi, but held a different attitude towards Wang Anshi's political reform.

Later, Lu Jiuyuan said that he went to the local government to be an official, which was fair and honest. Later, when Lu Jiuyuan was in his later years. He also contributed to the resistance of the Jin people. Although Lu Jiuyuan is as famous as Zhu, he is quite different from Zhu academically. Later, he discussed and exchanged their theories with Zhu in Jiangxi.