This is a very interesting novel. Here's my answer: The most tragic spy of the Southern Song Dynasty had been a spy for a lifetime. Why was he betrayed by the organization in the end? The spy's name was Zhang Zongchang, a high-level agent from the Southern Song Dynasty. He had been a spy for his entire life, serving the Southern Song Dynasty and making great contributions to the country. However, he was eventually betrayed by his own organization. This story tells us that as a spy, we should always be vigilant and not trust others easily. At the same time, he had to constantly improve his skills and knowledge in order to better complete his mission. If you have any doubts about your organization, you must report it in time to avoid losses. In addition, this story also tells us that sometimes, even if you serve your country with all your heart, you may not be able to gain true trust and respect. In a complex political environment, interpersonal relationships and the distribution of interests often affect your decisions and actions, so you need to think carefully.