 The importance of Dangun was influenced by Shin Chaeho's "A New Reading of History", and Dangun was emphasised over another legendary figure, Jizi (Kija), who was said to not be Korean in origin.Na claimed that the "Goshindo" religion was approximately 4300 years of age, which would make it Korea's oldest religion.After the annexation of Korea in 1910 by the Empire of Japan, the new religion was spread in Manchuria by Na, where it set up schools and social centers, and became a focus of the Korean independence movement.