Edgar snow is an American who loves China. He has a deep understanding of China's history, culture and social system. In 1930s, he visited China many times, and wrote books such as Red Star over China, which introduced the China Revolution and the Red Army to the whole world.

Si Nuo believes that China is a country with a long history and cultural heritage, and the Red Army is a symbol of the China revolution. He once said: "My sympathy for the revolution in China far exceeds my sympathy for the revolution in any other country." Therefore, he hopes that by visiting China, he can understand the real situation of China revolution and explore the future development direction of China.

In addition, Si Nuo believed that the China Revolution was an important part of the world revolution and had a far-reaching impact on the development of world history. Therefore, he hopes to make contributions to the cause of world revolution by understanding the situation of China revolution.

To sum up, Si Nuo's great interest in China and the Red Army at that time was due to many reasons, including his profound understanding of China's history, culture and social system, his sympathy and support for the people's revolutionary cause in China, and his contribution to the world revolutionary cause.