The main thing the Meng brothers did during this time was to send silk, tea, bamboo and wood and other goods from Shu to Hanzhong, and then sell the cattle, sheep, horses and other goods sent from Hanzhong. The other is to recruit displaced people and send them to Longxi.

In Longyou, with the arrival of more than 20,000 Tang troops from the north, the Tang State was actually the most powerful force in this region.

Under the organization of the government, a large number of displaced people from the Central Plains were introduced into Longyou, incorporated into military households, built tunken forts, and then reclaimed land, among which the most displaced people were in Sichuan, followed by Guanzhong and the Central Plains. The Han people from the Central Plains mainly entered Jinzhou (Ankang) through the Han River, and then transferred from Hanzhong to Longyou.

Because the Gao family, who controlled Jingxiang, voted for Wu, after controlling Jinzhou, the territory of the Northern Army and Wu were also on the border.

In the Tang Dynasty, Xingzhou had an iron prison, known as the Jizhong prison, which could produce more than 300,000 catties of iron every year, that is, more than 150 tons. This is also in the middle of the more than 40 iron prisons in China, and the income is quite good, and it is one of the important sources of finance and taxation for Xingyuan Mansion.

Since the implementation of salt and iron in the official camp, the price of iron costing more than 10 wen per catty has been sold to a high price of more than 30 wen, and the government of the past dynasties has made huge profits, and they are never tired of it, and they do not know that this practice is to exhaust the water and fish, which seriously hinders the development of the productive forces, and is one of the banes of the endless change of the Chinese Dynasty.

A pair of plowshares needs at least 30 catties of iron, that is, consistent money, which is equivalent to 7 or 8 acres of dry land, and such a high iron price has caused many farmers to not be able to afford plowshares at all, and are still using wooden plows and wooden hoes.

Hanzhong Xingyuan Mansion is located in the middle of nowhere, and most of the neighboring Lizhou and Bazhou are also poor mountainous areas, which cannot be compared with the economically developed Chengdu Fulu.

It was late summer, and at the confluence of the Fushui and Qingyang estuary, the barrage dam that had been built last year had been closed, and the reservoir had already begun to be impounded. The dam is built on the mountain, still a soil and stone structure, the dam is seven feet high, only the diversion culvert and flood discharge hole are made of concrete.

The Hanzhong Basin, with abundant precipitation and dense rivers in the surrounding mountains and forests, is very suitable for the development of water conservancy.

If you want to open up Longxi, you must first solve the problem of food supply, and the Hanzhong Plain, the imperial court is built as a grain supply base in Longxi in the future, and is ready to spend great efforts to build a completed water conservancy irrigation system, so that the surrounding hundreds of miles of farmland can be turned into fertile land that can be irrigated.

As the development of Hedong and Shanbei fell into a bottleneck, the imperial court shifted the focus of construction to Guanzhong and Hanzhong, and the huge investment of manpower and material resources made agricultural production gradually recover and become vigorous in the Guanzhong and Hanzhong regions that suffered heavy losses in the late Tang Dynasty and the Five Dynasties.

……

Sun Duo, the assassin of Jinzhou, and Hou Yi, the assassin of Shangzhou, successively defected to the northern army, making the northern army approaching Dengzhou and Nanyang, and the Luoyang court had no choice but to transfer Li Congke to lead the army to garrison Dengzhou and Nanyang.

At this time, the original authoritarian An Chongzhu had been punished by the clan, and Xuanhui made Zhao Yanshou succeed him as the privy envoy, and Fan Yanguang served as the Pingzhangshi of Tongzhongshu, that is, the prime minister. Fan Yanguang and Zhao Yanshou learned the lesson of An Chongzhu's monopoly on power and finally died and the clan was wiped out, and they were more indulgent to Li Congrong who returned to Luoyang.

Li Congrong is Li Siyuan's second son, but after his eldest brother Li Jijing was killed by Yuan Xingqin, he actually became the eldest son. He led the army to be defeated by the Northern Army in Cizhou and fled back, and after returning to Luoyang, he was not punished, but continued to sentence the guards of the Sixth Army in front of him, hoping to inherit Li Siyuan's position as a supervisor.

However, because the forces of the Northern Army had advanced to the north bank of the Yellow River, many officials in the DPRK and China were panicked, knowing that after Li Siyuan's death, they would not be able to prevent Li Qi from returning to Luoyang.

Jinyang is basically familiar with the situation in Luoyang, but it has always maintained a stalemate with the south, and the generals don't know what the Son of Heaven plans.

After arriving in Guanzhong from Hexi, Li Qi has been inspecting the restoration of water conservancy and irrigation facilities and diversion canals in various places.

The Guanzhong Plain, developed in the Han and Tang dynasties, has complete water conservancy facilities, and has nearly three million hectares of farmland in the heyday of the Tang Dynasty. However, due to the impact of the war at the end of the Tang Dynasty, the farmland at this time was less than 1 million hectares, and due to the damage of the war, it was not maintained, the river embankment collapsed, the canal was silted, and most of the water conservancy and irrigation facilities were destroyed.

After basically completing the development of Hedong and Shanbei, restoring agricultural production in Guanzhong and Hanzhong became an important task of the imperial court. Of course, the newly reclaimed wasteland is under the name of the government's public land, and it is not intended to be distributed to private individuals.

While Zhang Jinda led his army to occupy Shangzhou and Jinzhou, Li Qi was in Yaozhou, inspecting and supervising the Baihekou Reservoir and the Luohui Canal water diversion project built on the Beiluo River. After the completion of this water diversion irrigation project, more than 200,000 hectares of dry land in Yaozhou, Tongzhou and Huazhou will be irrigated, which will greatly improve the region's grain production and ability to resist natural disasters.

The biggest difficulty of the whole Luohui Canal water diversion project is to dig out a water diversion tunnel of more than seven miles long in Jinli Mountain, in this era, although there is already black powder to carry out blasting, most of the process of digging the rock cave mainly relies on manual construction, and the whole project is very difficult. At present, more than half of the excavation progress of the entire cave has been completed, and it is expected that the whole will be completed before the beginning of spring next year, and the sluice gate will be opened to release water.

In the history of another time and space, the Luohui Canal Project only existed on paper during the period of the Chinese dynasties, and it was only during the period when General Yang Hucheng supervised Shaanxi that the construction began to be started. It's just that when General Yang was killed by the Kuomintang in Chongqing, he was not able to see the grand occasion when this water conservancy project benefiting all the people was opened to water.

It was not until the arrival of the new society that the water diversion and irrigation project that the people of Guanzhong had been thinking about for thousands of years was really completed and put into use. This is what makes Li Qi proud, in this time and space, he fulfilled his wish for General Yang a thousand years in advance, and building a new China is also the goal he strives to achieve.

Another important project in Guanzhong is the reconstruction and expansion of the Longmen Iron Prison in Hancheng.

As early as the Han Dynasty, Hancheng had an iron official, opened a government-run iron smelting office, and had a record of mining and iron smelting. During the period of the Northern and Southern Dynasties, the mountains of Xiayang were placed in iron smelting, and then reverted to the iron supervisor, and there were more than 8,000 craftsmen under the jurisdiction of the Xiayang Iron Supervision at the most prosperous time, which was the most important iron-producing place in the Western Wei Dynasty and the Northern Zhou Dynasty.

However, although the iron produced by Hancheng Iron Smelting Workshop is of good quality, the cost of iron ore mining is high, coupled with the inconvenient transportation, it has not formed a scale like Ci and Xiangerzhou. Affected by the war at the end of the Tang Dynasty, the Longmen Iron Prison of Hancheng has basically come to a standstill. After recovering the river, the imperial court began to rebuild the Longmen Iron Prison in the upper reaches of the river.

Because the ore produced by Hancheng Iron Mine contains less impurities, the quality is much better than that of Cizhou and Xiangzhou Iron Mine, and the weapons and armor created are of high quality, so Li Qi still attaches great importance to the reconstruction and development here.

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