How does Neo-Confucianism in Song and Ming Dynasties deepen traditional Confucianism?

Neo-Confucianism in Song Dynasty developed Confucianism from another angle, which can be said to be not deepened. His thought of preserving righteousness and destroying human desires is contrary to the essence of traditional Confucian benevolence spirit. It was the embryonic period of capitalism, and the rulers wanted to further strengthen centralized management. At the same time, Confucian scholars in Song Dynasty made their own subjective reflection on traditional Confucianism and developed Neo-Confucianism. It is a side branch of Confucianism, or a small alienation (this is a bit serious), but it can be said that it strengthens the connection between man and nature from the outside to the inside, and also focuses on internal development. From this perspective, it is still useful for reference. But a culture, from virtue to abstinence, is bound to be weak.