In the first 20 years of the 20th century, as a modern significant concept, the concept of "Chinese Nation" was coined and developed gradually, while this period is critical to complete the transition from Chinese nation’s self-existence to its self-consciousness. Meanwhile, Li Dazhao and Sun Yat-sen, two great personages who were about to make join efforts to prompt the radical change in modern history, had spontaneously called for a "New Chinese Nationalism" one after another as if by prior agreement, which could be regarded as a concentrated and distinct sign of this national idea.