Around the mid-Joseon Dynasty, the established view among historians traced Korean origins to Chinese refugees, considering Korean history that of a long series of kingdoms connected with China. As such, the Gija Joseon and Silla states were valorized, while the Gojoseon and Goguryeo states were not considered as important. According to this view, the first state in Korea, Gija Joseon, was founded by Jizi in 1122 BCE, who was a disgruntled Chinese advisor to the Shang Dynasty. The story of how he brought poetry, music, medicine, trade, and a political system to the Korean peninsula was conceived similarly to the proposed Founding of Rome by the Trojan refugee Aeneas. But by the 1930s, under the influence of Shin Chaeho's histories, the Jizi Korean founding story became less popular than that of Dangun, the son of a tiger and a bear – the latter being common in Japanese folklore – who brought civilization to the Korean peninsula. Shin and the other historians who promulgated this myth had been influenced by Daejonggyo, a new religious movement which worshipped Dangun, but attacked pre-annexation textbook narratives of Dangun which portrayed him as the brother of the Japanese god Susanoo. To Shin, Dangun was both the founder of the Korean "minjok" and the first Korean state ("kuk"), and thus the necessary starting point for Korean history. In response to a challenge by the Japanese scholars Shiratori Kurakichi and Imanishi Ryū of Dangun as a fabrication by the author of the "Samguk yusa", nationalist historian Choe Nam-seon attacked Japanese mythology as being built upon fabrications.