After the Lugou Bridge Incident in 1937, the War of Resistance Against Japanese Aggression broke out.

Under the leadership of Zhang Xin (formerly known as Zhang Yunxiang, a native of Southwest Street in Lijin County), An Keping (formerly known as An Yunchang, a native of North Street in Lijin County), Zhao Gan (formerly known as Zhao Yuxuan, a native of Jiahe in Zhaojia Jiahe, Lijin), and others, a group of intellectual youths with patriotic consciousness in Lijin were full of passion for resisting Japan and saving the country, and joined the Eighth Route Army and the New Fourth Army.

Later, under the mobilization of Li Yuzhen, who was the head of the anti-Japanese democratic government of Ningjin County, and Zhao Yunqing (formerly known as Zhao Yuanfeng, a native of Yanwo in Lijin), who served in the 115th Division of the Eighth Route Army, Fu Ruiwu and Yun Shangren regained their strength after a period of silence, led dozens of brothers under their command, and resolutely joined the team of Yang Guofu of the Shandong Column of the Eighth Route Army, and embarked on the road of resisting Japan and saving the country under the leadership of the Communist Party.

Under the cover of night, Lao Sanyun Shangren and a squad of soldiers were quietly approaching the enemy artillery tower. When they came to the trench, a group of people immediately leaned over and scattered, fanning and quietly surrounding the turret.

After following the black brother Fu Ruiwu to participate in the Eighth Road, Yun Shangren was appointed as the squad leader of the sharp knife squad because of his rich combat experience, courage and strategy. At this moment, he is leading the whole class to carry out the task of uprooting the Shajiawa stronghold and opening a passage for the large army to march into the northern Lu area.

Yun Shangren saw that his comrades-in-arms had been ambushed in place, so he quietly cut the barbed wire fence on the edge of the trench, and was just about to pick up the explosive bag and prepare to crawl over, when he suddenly heard a few clanging sounds above his head, so he hurriedly retracted into the trench. It turned out that the cunning enemy, in order to be on guard, actually hung small bells around the barbed wire fence by the trench, and at night when touched would jingle and the sound could be heard far away.

When the enemy on the turret heard the sound, he immediately moved over his searchlight, and then a volley of bullets flew over.

Yun Shangren had already prepared, and before the gunshots fell, he quickly grabbed a pheasant from the bag behind him, threw the pheasant out with a backhand. The pheasant followed the pillar of the searchlight and clucked towards the turret. Seeing this, the enemy on the turret cursed and moved the searchlight elsewhere......

Taking advantage of this moment, Yun Shangren immediately got up, climbed up the trench, rushed to the bottom of the turret with a few arrows, pulled the fuse suddenly, and then leaned back, rolling and slipping down.

Immediately after a loud "boom", the fighters jumped to their feet and rushed forward shouting......

It turned out that in the early days of the Anti-Japanese War, the scope of activities of the troops of the Shandong Eighth Route Army was in the narrow area north of Jiaoji Road and south of Xiaoqing River, directly pinning down the enemy's strategic communication line - Jiaoji Railway. Later, with the enemy's frequent sweeps of our troops, the struggle was extremely arduous, and the troops could not rest and recuperate. Whether to persist in the war on the plains across the railways and relying on the southern mountains, or whether to independently and comprehensively adhere to the war on the plains - this question has plagued the commanders of the Eighth Route Army for a long time.

Later, after repeated discussions, the Shandong Column of the Eighth Route Army made a new strategic adjustment: to give up the small mountainous base area south of the Jiaoji Railway, no longer always riding the railway, and Xu Shiyou led the 386 Brigade and the Independent Regiment to go deep into the mountainous areas of Jiaodong and Lunan to establish a base area, and wait for an opportunity to open up the coastal line of Lunan and Jiaodong; The 3rd Brigade of the other route, led by Yang Guofu, moved into the hinterland of the Yellow River estuary, which was deeper and more extensive in northern Shandong, and concentrated all its efforts on persisting in the war on the plains, gradually establishing base areas, and then opening up the passage between the Yellow River estuary and the Hebei-Shandong border area.

The development of the situation became more and more gratifying, and after successively taking several artillery towers and strongholds such as Shajiawa and Yingli, the door of the Eighth Route Army's northward advance was also completely opened. Soon after the establishment of the Qingshuibo base area, Yang Guofu's Eighth Route Army crossed the Xiaoqing River in three routes, went all the way north, and continued to advance towards the mouth of the Yellow River in northern Lubei.