As for why Laozi only wrote the Tao Te Ching, there was no conclusive evidence to prove that the reason why he deliberately did not write other books was because he was immoral. On the contrary, some versions of the Tao Te Ching have great contradictions with other literature, which indicates that Laozi may not have written other works. There may be different explanations for why Laozi wrote the Tao Te Ching. One possible explanation is that the Tao Te Ching was written by Laozi when he was pondering and thinking about the nature and human nature. The theme of the Tao Te Ching was about the relationship between Tao and virtue, as well as the relationship between man and nature. Laozi might think that by understanding and following these principles, one can achieve inner peace and happiness. Another possible explanation is that Lao Tzu may not have realized that other philosophers and philosophers had existed for a long time in Chinese history. His book might have been discovered and sorted out at a later time along with other works. In short, there may be different explanations for why Laozi only wrote one Tao Te Ching, but no matter which explanation it is, it shows that Laozi attached great importance to and appreciated Tao Te Ching.