In 1935, Mao Zedong called the most difficult and darkest moment of the Chinese revolution and his life, which was even worse than the failure of the Great Revolution in 1922.

Mao Zedong and Zhang Guotao (Pictures from the Internet)

In September of this year, Zhang Guotao led more than 83,000 Red Fourth Front Army to go south and embarked on the road of splitting Red Army ; Mao Zedong led more than 7,000 Central Red Army to north. When he went north, northern Shaanxi was determined to be the central revolutionary base. As a result, before he arrived in northern Shaanxi, the Red Fourth Front Army's power, the Red 25th Army, had taken full control of northern Shaanxi and was carrying out anti-counterfeiting and expansion. Gao Gang, the main leaders of northern Shaanxi, had all been arrested. The Red 25th Army is a subordinate of Zhang Guotao and is under the Red Fourth Front Army. The commander is Xu Haidong .

Mao Zedong was on his way to northern Shaanxi (pictures are from the Internet)

Mao Zedong was unsure. If the Red 25th Army listened to Zhang Guotao, the Central Committee would have no place to stand, so he wrote a letter to Xu Haidong and borrowed 2,500 oceans from the 25th Army. After receiving the letter, Xu Haidong asked the military officer around him how much money he still has. The military officer said there were still 7,000 oceans. Xu Haidong said that he would give the Central Red Army five thousand oceans, whether to lend it, and attached a letter to Mao Zedong, saying that the Red 25th Army was completely obeying the central command. The stone in Mao Zedong's heart fell to the ground and led the Central Red Army to Yan'an in northern Shaanxi, and Yan'an became a holy place for the Chinese revolution.

Mao Zedong during the northern Shaanxi period (pictures are from the Internet)

. After Zhang Guotao led the Red Fourth Front Army to Maerkang County, it was desperately blocked by troops such as Liu Xiang, Yang Sen, and Xue Yue . It suffered heavy losses. Later, it was forced to go north to meet with the Central Red Army, ending the division.

Mao Zedong said that Xu Haidong was a great contribution to the Chinese revolution. Xu Haidong was awarded the rank of general in 1955, ranking second in the founding general.

Xu Haidong (picture source from the Internet)