The Tatars, who were under pressure to survive, repeatedly invaded Ganzhou, Liangzhou, Zhuanglang and other places, and they set their sights on a key place - Zhuanglang Hongchengzi.

Hongchengzi is 60 miles away from Zhuang Langwei in the north, and 150 miles away from Jincheng in the south.

As early as the second year of Emperor Wu of the Han Dynasty (121 years ago), the hussar general Huo Quai, sent 10,000 cavalry elite soldiers out of Longxi, marched to Hexi, defeated the Xiongnu, and occupied the Hexi region. And from the west of Shuofang to Lingju (in Zhuanglang) "often through the canal, the field of officials and officials died fifty or sixty thousand people" ("Hanshu Food and Goods") Tuntian, the history is called Lingju Tuntian. The Hongcheng area is within the boundaries of Tuntian.

In the sixth year of Emperor Zhao of the Han Dynasty (81 B.C.), the Han Dynasty placed Jincheng County, with thirteen counties, including Yunjie County, which is in the west of the Hongcheng Lishui (Zhuanglang River) River, "Later Han Shu Ming Emperor Ji": "The city is separated by Lishui (Zhuanglang River), a Lishui City. Because its city wall is made of red clay, it is also called the Red City.

By the time the Western Xia established power, most of the Lishui Valley was occupied by the Western Xia Kingdom. The Western Xia set up Zhuo Luo and the Southern Supervision Military Division in Hongchengzi. Zhuo Luo and Nanjian Jun Si are about 80 kilometers away from Lanzhou in the south, about 175 kilometers away from Liangzhou Mansion in the northwest, and about 150 kilometers away from Huizhou (Jingyuan) in the east. Once Lan and Hui are not guaranteed, the heavy troops stationed in Zhuoluo and the Southern Supervision Army Division will become the base camp of the defense line north of the Yellow River in Western Xia."

Yuan Dynasty, Kublai Khan to the first year of the Yuan Dynasty (1264 AD), the Mongol Khanate set up Zhuanglang County in the Zhuanglang River Basin, and built Zhuanglang City (now Yongdeng City), the Hongcheng area belongs to Zhuanglang County, belongs to the Gansu Administration Yongchang Road subordinate.

In the second year of Hongwu in the Ming Dynasty, Hongchengzi moved from Hexi to Hongchengzi in the east of Hedong is adjacent to Qingming Mountain in the east, and the Zhuanglang River is choked in the west. The city has a compact layout and well-equipped city defense, and is an important military town set up by the Ming regime in the west of Lanzhou.

During this period, the Zhuanglang River Basin ushered in a golden period of agricultural development and economic development. In order to strengthen the defense of the Hexi region and meet the army's food and salary, the Ming regime built a large number of tuntian fields here according to local conditions. The government will provide cattle, farming tools and seeds needed for the fields, and make up for the shortages as they occur. At the same time, the low-tax policy of "measuring land resources and distinguishing between taxation and taxation" will be implemented. In principle, those who open up the wasteland for cultivation on their own "will never be able to afford to do so," and this has aroused the enthusiasm of the military and the people in cultivating the wasteland. Coupled with the further improvement of water conservancy facilities, in the thirteenth year of Hongwu (1397), there was a rich scene of Zhuanglang (Yongdeng County) "accumulating years and abundance, losing officials with two out of ten, and giving eight points to soldiers".

For this reason, the Ming court attached great importance to the garrison of the Red City.

The Ming court decided to attack and defend. In the fourth year of Emperor Jingtai (1453), Xiao Jing, the general soldier of Gansu, and Bowei Ying of Xuancheng led Lu Jian and others to attack Bo Yahu and force back the invaders. In the first year of Tianshun (1457) of Yingzong of the Ming Dynasty, A Luo and others invaded Zhuang Lang with great momentum. Upon hearing the news, Lu Jian and Zhuang Lang garrisoned Wei Rong to lead the troops to resist tenaciously, set up an ambush in Heigangzi, killed 37 people by surprise, and repelled them. Lu Jian was promoted because of his merits and commanded the affairs and garrisoned the Red City. Emperor Yingzong of the Ming Dynasty clearly defined his duties in the edict:

"Hongchengzi lives in Lanzhou, in the Zhuang Lang, where all the envoys and guests, the transfer of grain storage, are from this to and fro, the most important. Now Israel is in charge of the soldiers of the territory, and the thieves are served, and the people are convinced. He was specially ordered to command the original local soldiers, and listened to the first and second teams in Zhuang Lang's garrison army to garrison there. Drill military horses, stick to the place, and act in case of emergency. Still listen to the commander-in-chief, town guard and other officials to control the dispatch. In order to be honest and impartial, under the leadership of the leader, it is not allowed to scratch and harm subordinates and private sergeants, and there is a sense of integrity. If they violate, the offense will not be light. Erqi respects and is cautious. Therefore. ”

It turned out that when Lu Jian, who was in his thirties, constantly went through the baptism of war, gradually showed outstanding military talent, and was able to take charge of himself, the imperial court made a decision to send him to garrison the Red City.

Lu Jian lived up to expectations. When he was guarding the Red City, Liangzhou and Zhuanglang were criss-crossed. Lu Jian sighed: "But let the dragon city fly in, don't teach Hu Ma to Yin Mountain!" Receiving the country's kindness and guarding the important land, so that the captives are as rebellious, how can he stand above the three armies! ”

In the first year of Tianshun (1457), the Mongol Tatar chieftain came to support the establishment of Tokhtar without sweating Zi Ma'er as the khan, known as the little prince. After the establishment of the little prince, the power of the Tatar tribe grew. In the second year of Tianshun (1458), 20,000 troops raided Liangzhou and other places, bringing great disasters to the Hexi Corridor area. In view of this, in the third year of Tianshun (1459), when the Mongol Tatars invaded again, Lu Jian and the governor Lin Hong fought together, and they set up an ambush in Wusheling and defeated the invading enemy. Ming Yingzong praised him as "a prisoner who is a prisoner, and he can be brave and brave to kill thieves." Loyal and diligent, good and good". Lu Jian was promoted to one level as an official, and he was also in command. In the fifth year of Tianshun (1461), Lu Jian sent troops again and set up an ambush to repel the invasion of the Polai tribe.

In the fifth year of Tianshun (A.D. 1461) in February, Zhuanglang (now Yongdeng, Gansu) was disturbed. In May, he came to the Xuanfu.

The border is constantly under fire.

Lu Jian, who was on the front line, did not dare to be careless, and immediately made a solemn wave and waited for the battle.

At this time of crisis, in the first month of the eighth year of Tianshun (1464), Zhu Qizhen of Ming Yingzong was seriously ill. On the sickbed, Yingzong summoned the crown prince Zhu Jianshen and handed him the responsibility of the Ming Empire. Then, the dying emperor thought for a long time and said his last words to the crown prince, and it was this last wish that added the brightest color to his life.

Ming Yingzong said: "Since Emperor Gao, but every time the emperor collapses, there will always be many people in the harem to be martyred, I can't bear to do this, I don't want to be martyred after I die, you have to remember that there can be no more such things in the future!" ”

"I'll do it." Zhu Jianshen, who was kneeling in front of the bed, solemnly made his promise.

Since Zhu Yuanzhang, the emperor of the Ming Dynasty formulated an extremely cruel rule, every time the emperor died, the harem had to find someone to be buried, Zhu Yuanzhang and Zhu Di needless to say, and the emperors of later generations were not an exception, this inhumane system was finally abolished by Ming Yingzong,

In the seventh year of Tianshun (1463), Jianduer launched a rebellion, Lu Jian cooperated with the eunuch Meng Tai, Xuancheng Bo Weiying, and Wu Chen, the right to conquer the capital, although Lu Jian was shot in the left leg, he still fought bravely to kill the enemy, and finally put down the tribal rebellion, killing more than 200 people in total. In the first year of Chenghua of Ming Xianzong (1465), Lu Jiansheng commanded the envoy, worshiped the hussar general, acted as the governor of the capital, served as the left general, transferred out of Hongchengzi, and assisted in guarding Zhuanglang. During this period, Lu Jian donated 100 taels to rebuild Zhuang Langwei Confucianism.

Lu Jian's outstanding military talents were approved by the rulers. Ming Xianzong's edict to Lu Jian said: "The commander of the capital is Lu Jian: follow the herd today, seek courage with you, and guard Zhuang Lang." He immediately led more than 400 horses and soldiers to Zhuang Lang, guarded the place, drilled the military horses, repaired the city, compensated the soldiers, and defended the thieves. In case of emergency, the camera acts. still listen to the moderation of the chief military officer of the Gansu town guard. As soon as military affairs are met, you and the coordinator will command Zhao Ying to stop and act in the long run, and he is not allowed to be paranoid and take advantage of the mistakes. ”

Lu Jian attached great importance to the development of local education, and in the first year of Chenghua (1465), he donated 100 taels for the rebuilding of Zhuanglangwei Confucianism.