How and why the warlord Wu died is still a mystery.

It is said that warlord Wu died of illness, but later it was speculated that he died because he was treated by a Japanese doctor recommended by a Japanese spy. However, because there was no evidence, his death became a mystery, but according to Wu's wife's memory, he was killed by a Japanese spy.

Wu, a native of Shandong Province, was a scholar during Guangxu period, and later participated in Yuan Shikai's training, and was soon assigned to Cao Kunying of Yuan Shikai. Later, Yuan Shikai died, because there was no successor, and the whole Beiyang Army fell into infighting. After that, the country entered a period of warlord melee. At this time, Wu laid the foundation for most of the country with his excellent command ability.

Cao Kun, his immediate boss, once commented sourly on him: "As long as Wu sneezes, it will rain in Beijing and Tianjin." In this regard, an American magazine at that time also chose Wu as the cover of the magazine, which also said that he was the strongest person in China and a person who would unify China. But at this point, Americans are wrong. In the winter of the same year, Wu was beaten out of the water by Zhang in the war for state control, and Wu quickly became a second-rate warlord from the strongest.

Later, Chiang Kai-shek also wiped out the remaining troops, so he had to settle in Peiping as an ordinary person and prepare to enjoy his old age. But later, Japan occupied Beiping, and the Japanese wanted to stabilize the situation in Beiping quickly, so they wanted to take advantage of the temptation of senior officials and ask Wu for help. However, Wu is a patriotic man, and he refuses to pay bribes to the Japanese. It is also because he doesn't agree that he is admired.