What kind of story is Zheng Xiaojiao? What's it about? Thank you all.

The story of Zheng Xiaojiao originated from the folk, spread in the folk, to Zheng Xiaojiao story as the theme of the play lyrics, drum book and opera in various forms. The drama "Zheng Xiaojiao" is based on the traditional story. The drama recounts the story of Zheng Xiaojiao, a girl who was persecuted by her stepmother Wu, and was rescued by Gui Zhongbei, a scholar who went to the mountains to collect medicines and stayed home to recover from his injuries. In the year of the Great Competition, Gui Zhongbi went to the capital to take the examination and won the first prize, and was spotted by Zhao Taishi, who wanted to recruit him as his son-in-law and detained him in his house. The servant who delivered the wedding report to Gui's house mistakenly stayed at the hotel owned by Wu's family, and the wedding report was changed into a letter of repudiation, which caused a storm. When Zhao learns that Zheng Xiaojiao is the wife of Gui Zhongbi, he tries to kill her, but thanks to the help of her maid Chunlan, she is saved from death. Thanks to the help of her maid Chunlan, she is saved from death. Gui Zhongbi misses Zheng Xiaojiao and takes the opportunity to escape. Zheng Xiao-jiao becomes a nun at the Iron Buddha Eunuchs, but Zhao Taishi and his soldiers hunt down Gui Zhongbi, killing his mother and capturing him. Zheng Xiao-jiao, not knowing the truth, mistakenly believes that Gui Zhongbi has killed his wife and his mother, and vows to take revenge. Yuehua, a female nun, teaches Zheng Xiaojiao how to cure people's illnesses. When the Empress Dowager is seriously ill and looking for a doctor, Yuehua tells Zheng Xiao-jiao to disguise herself as a man and go to the palace to offer her medicine, and to seek justice for her wrongdoings. After many trials and tribulations, Zheng Xiao-jiao was able to avenge her wrongdoing, and Gui Zhongbei was able to clear up his doubts and return to his hometown. ......