Yan Hexiang is the eldest son of the Yan family. He has been frail and sick since he was a child. His father was worried about his son's health and searched for famous doctors, but failed to cure Yan Hexiang's illness. Until one day, a wandering sorcerer came to the house and told Mr. Yan that there was a fairy medicine in the north called "Medicine Sugar". Master Yan sent someone to search for the medicine, and a few years later he brought back a little baby, named Guo Qilin...
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