We can conclude that Di Renjie didn't come to Lan Workshop for promotion. In the movie, Di Renjie was transferred to Lanfang County, a place with a harsh environment and turbulent situation. He was sent to Lan Workshop to train himself in a more complicated environment. Therefore, Di Renjie did not come to Lan Workshop for promotion, but to face a bigger challenge.
Lan Workshop referred to a place in the TV series " The Case of Di Gong of the Great Tang ". It was located in the northwest border town of the Tang Empire. In the plot, Di Renjie was sent to Lanfang County to solve a case. However, the search results did not provide any information on the specific location of the Lan Workshop in the real world. Therefore, he could not tell exactly where the Orchid Workshop was.
Di Renjie went to Lanfang to be the county magistrate.
[Cao An and Di Renjie went to Lan Workshop.]
Cao An followed Di Renjie to Lanfang County.
Di Renjie's promotion process could be obtained from the search results provided. According to the contents of document [1] and document [2], Di Renjie held many important positions in his official career. He had held more than 20 important positions, such as the Chief of the Supreme Court, the Governor of a prefecture, the Governor of Youzhou, and the Pingzhang of Tongfeng Pavilion and Luan Tai. He served as prime minister twice. The first time was in 691 AD, but he was demoted to Pengze County Magistrate after only three months. However, after he made a comeback, he became prime minister for the second time in 697 AD. He served for more than three years until the last moment of his life. In general, Di Renjie's promotion process was remarkable. He showed outstanding achievements in different positions and was deeply loved by the people.
The Orchid Workshop was a place where a series of murders had taken place. The protagonist was Di Renjie, a famous detective. During his investigation, he found a person named Lin Fan, but Lin Fan turned out to be his brother, Huaiying. The other important character was Cao An, who had a complicated relationship with Huaiying. The cause of the murder was an old case. A girl named Chun Yu and Chu Lei were in love, but they were forced to separate due to family opposition. As the investigation went deeper, Di Renjie discovered a shocking fact-Huaiying was a dark force that led the murder case, and he was Black Flame. Cao An had a close relationship with the black flames. In the end, Di Renjie eradicated the Black Flame Organization in Lan Workshop and re-established the laws of the Great Tang. As for whether Di Renjie chose Cao An, the article did not explicitly mention it.
Di Renjie found clues related to the army during his investigation at the Orchid Heart Pavilion. However, in the process of his investigation, a series of tragedies occurred, including the Xue Estate and Orchid Heart Pavilion. These tragedies confirmed Di Renjie's judgment, and Xue Qinglin himself was murdered by a mysterious force. As for why the county head stole the secret letter, it might have something to do with the purpose of the internal guards lurking in Jiangzhou. They wanted to steal Xue Qinglin's secret letter. As for other plots and plots about Di Renjie, there was no relevant answer in the information provided so far.
The plot of Di Renjie proposing to Lan Ling could be found in Tongtian Di Renjie. In the drama, Di Renjie proposed to Lan Ling in order to comfort her. This scene appeared in the 49th episode of the series. The details of the plot could be understood by watching the show.
The Lanfang in the case of Duke Di of the Great Tang was a remote county in the Tang Dynasty. It was located in the northwest of the Great Tang Empire, adjacent to the Turkic Jimi Prefecture. According to the description in " The Great Tang's Duke Di's Case ", Lanfang County was now called Lanling, located in the Lanling County area of Linyi City. Therefore, Lan Workshop was now Lanling County.
Di Renjie did not marry Lan Ling in the end. Although Lan Ling had been taking care of Di Renjie's daily life and had a crush on him, the two of them did not end up together. In the drama, Lan Ling had sacrificed a lot for Di Renjie, even sacrificing her own life. However, Di Renjie's wife's surname was not Fei, so Fei Lanling was not Di Renjie's wife. Therefore, according to the information provided, Di Renjie did not marry Lan Ling in the end.