"Iron Teeth and Bronze Teeth Ji Xiaolan" was filmed in four parts, with 40 episodes in the first part, 43 episodes in the second part, 40 episodes in the third part, and 42 episodes in the fourth part. This is the first part. During the Qianlong period of the Qing Dynasty, the world presented a scene of peace and prosperity, which was called "Kangqian Prosperity" by later generations. However, the apparent peace and prosperity of the country and the people could not conceal the increasingly intensified contradictions. Qianlong (played by Zhang Tielin) was a monarch who was quite capable and vigorous, and at the same time a politician who was well versed in the doctrine of the mean. He loved talents very much and could understand the selfless character of the university scholar Ji Xiaolan (played by Zhang Guoli) who was upright and upright and enforced the law impartially. He was also greedy for flattery and especially appreciated the flattery of the Minister of the Ministry of Revenue Heshen (played by Wang Gang), who was wagging his tail and begging for mercy and obeying orders. Ji Xiaolan and Heshen were a pair of enemies who had been incompatible, polar opposites, and political enemies for many years. When Emperor Qianlong heard the few words about his life from his dying wet nurse, it was like a bolt from the blue. In order to trace the source and solve the mystery, and to thoroughly investigate the crime of officials in Yunzhou area who embezzled disaster relief funds, he led two of his most trusted ministers to travel tirelessly, visit incognito, and follow the clues, determined to reveal the whole truth to the world.