What were Sun Yat-sen's Three Principles?
Sun Yat-sen's programme was called the Three Principles (San). These principles formed the basis of the political philosophy of the Guomindang.
The Three Principles were: Nationalism, which meant overthrowing the Manchu who were seen as a foreign dynasty, as well as other foreign imperialists; Democracy, which meant establishing democratic government; and Socialism, which meant regulating capital and equalising landholdings.
These principles were inspired by ideas from Japan and the West, as Sun Yat-sen was a republican revolutionary who became the first president of the republic established in 1911.
Explanation
The question asks about Sun Yat-sen's Three Principles. The textbook explicitly lists these as nationalism (overthrowing the Manchu dynasty and foreign imperialists), democracy (establishing democratic government), and socialism (regulating capital and equalising landholdings). This is a direct factual question requiring students to recall and list the three principles with their meanings.