Yongxin County is a county in the west of Jiangxi province, People's Republic of China, bordering Hunan province to the west. It is located within the Jinggang Mountains under the jurisdiction of the prefecture-level city of Ji'an. The county was built in the ninth year of Jian'an in the Eastern Han dynasty that is, in 204 AD. The name of the county was derived f…Yongxin County is a county in the west of Jiangxi province, People's Republic of China, bordering Hunan province to the west. It is located within the Jinggang Mountains under the jurisdiction of the prefecture-level city of Ji'an. The county was built in the ninth year of Jian'an in the Eastern Han dynasty that is, in 204 AD. The name of the county was derived from Great Learning in the meaning of "the sun is forever and the moon is new ".