Looking for Gu in the Qilan Kingdom

Zhang Zhe and Sun Yin met online because they had a strong interest in voodoo medicine. Sun Yin was a girl from the Miao family. By chance, she heard that her grandfather had seen the long-standing voodoo medicine Yinmancao. She also heard that Zhang Zhe's father had visited her parents and searched for it. Sun Yin told Zhang Zhe about this. After Zhang Zhe heard the news about his father who had been missing for ten years, he resolutely agreed to go to Sun Yin's parents to accompany her to search for Hu Mancao. Sun Yin's grandfather knew that the road to find the poison was very dangerous and did not want to reveal any information about Mancao. Only after Sun Yin's hard work did he tell the truth about the death of Sun Yin's parents and told the two people the location of the growth of Mancao. The two went through all kinds of hardships along the way to the forest where Mancao grew. However, in this forest they discovered the tribe of residents of the ancient Qielan country that had been extinct thousands of years ago...