A young boy was born alone, his name was Jiangbei, his surname was unknown. An old fisherman was found in the north of the river, so he called him Jiangbei and raised him as his grandson. The grandfather and grandson depended on each other for life, without a father or a mother.
Later, he was raised by his master under the gate of Changbai Mountain and met Chu Nan. From then on, various stories between the two began.