What does Meng Man's unsolved case mean?

Refers to the right-of-way diplomacy with Zhang and Zhang Xueliang on the rights and interests of Manchuria Railway in the 1920s and 1930s. The specific content is not clear, but remember the history.

At 5: 30 in the morning, when Zhang's special train passed the Sandong Bridge at the intersection of Jingfeng and Nanman Railway, the train was blown up by explosives buried by the Japanese Kwantung Army, and Zhang was seriously injured. After being sent back to Shenyang, he died on the same day. But the secret is not mourning.

His son, Zhang Xueliang, set out from the front line and rushed back to Shenyang on June 18, which stabilized the situation in Northeast China. It was not until June 2 1 that Zhang Xueliang was officially buried as his stepfather. The incident happened to the east of Huanggutun Station, which is called Huanggutun Incident in history. At that time, in Japan, because the murderer was not announced, the Japanese government always called it "the Manchurian event."

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background

1in April, 927, after Tanaka took office, he asked Zhang for railway rights and forced Zhang to solve the so-called "Manchu-Mongolian unsolved case", which aroused the anti-Japanese anger of the northeast people.

On September 4th, 20,000 people demonstrated in Shenyang, shouting "Down with Tanaka Cabinet". Under the impact of the national anti-imperialist wave and Zhang's own national consciousness, the government failed to meet all the requirements of Japan in "Manchuria", such as building roads, mining, setting up factories, renting land and emigrating, and boycotted it, which was intolerable to the Japanese cabinet. The Japanese Kwantung Army decided that the anti-Japanese demonstrations of the people in Northeast China were instigated by Zhang and hated him.

1On April 5, 928, Chiang Kai-shek swore in Xuzhou that in order to expand his territory, he held the "Second Northern Expedition" against the old Beiyang warlord headed by Zhang. On April 9, the first army launched a full-scale attack. On April 30th, armies from all countries launched a general attack on Jinan. That night, Zhang Zongchang rate areas abandoned north to flee. In late May, the national army approached the Beijing-Tianjin region. Zhang Jian, the "Marshal of the Republic of China" entrenched in Beijing, saw that the general trend was gone. On June 2, he issued a "power on" and announced his withdrawal from Beijing and his return to the Northeast.