The most famous story is to remain uncorrupted:
In the era of Yu Qian's life, corruption prevailed in North Korea's political arena and bribery became the norm. At that time, when bureaucrats from all over the country visited the emperor in Beijing, they collected many local products, such as silk handkerchief, mushrooms and incense sticks, and gave them to the emperor and the dignitaries in the DPRK. During the orthodox period of Ming Dynasty, eunuch Wang Zhen abused power for personal gain. Every time at the court meeting, local officials would offer more jewels and silver to please him. Governor Yu Qian never brings a gift when he goes to Beijing to play. His colleague advised him: "Although you don't offer treasures or seek dignitaries, you should also bring some famous local products such as thread incense, mushrooms and handkerchiefs to show some kindness!" Yu Qian smiled and raised his sleeves and said humorously, "There is a breeze!" To mock those flattering corrupt officials. The idiom "remain uncorrupted" has been handed down since then.