First, Siam was in the "buffer zone" where Britain and France colonized Southeast Asia, thus maintaining its independence. Some European and American scholars support this view. Dobby, a famous American geographer, put forward in his book Southeast Asia: "Thailand is the only country in Southeast Asia that remains independent even though its surrounding areas are colonized and enslaved by Europeans. However, in this enslaved region, the significance of Thai independence is more apparent than reality, because it originally existed as a buffer state between the French colonial interests in Indian zhina and the British colonial interests in Myanmar and Malaya, and its independence was "tolerated" by the colonists rather than supported by their own strength. ? Second, the Siam dynasty reformed in time and achieved certain results, which made Siam maintain its independent status.