During the Ming Dynasty, there was a young farm boy named Zhang Youwen. He was only fifteen years old, but he had lofty ideals. He was unwilling to be a farmer all his life and wanted to be successful. However, because his family was poor, his parents were unable to send him to study to gain fame. So the young man wanted to study medicine as a teacher, but he had no skills. Later, after inquiring, I learned that there was an old immortal in Baiyun Mountain not far away who had superb medical skills and often treated people's illnesses and saved lives for free, so Zhang Youwen started to study medicine as a disciple.
