At the beginning of the founding of the Tang Dynasty, after the war at the end of the Sui Dynasty, the population of the country decreased by as much as 50%. In particular, the population in the north suffered heavy casualties.

In the heyday of the population of the former Sui Dynasty, there were more than 1,700 households, but the population of the Yellow Book was only more than 60 million, and even fewer were in Dingkou. In fact, it is not only the Haoqiang and the gate valve family that conceals the population, but even the common people are desperately hiding the population.

Dingkou is not a population, but a population that needs to pay taxes. Men 13 and women 15 need to pay the Ding Kou tax, and it is precisely because of the existence of the Ding Kou tax that it will cause the ancient abandoned babies and drowned babies.

On the one hand, they can't afford it, and on the other hand, the taxes are too heavy.

At that time, the Dingkou tax was abolished, and then the population grew explosively, although the tax revenue of the Great Qian's period seemed to be higher than that of the Liu Song and Sui dynasties.

However, if it is converted into taxes such as dingkou, field tax, and labor force, it will be found that the taxes that the people need to pay are actually at least 50%.

Therefore, after the founding of the Tang Dynasty, Wang Xuanjing wrote to ask for the abolition of the Dingkou tax to encourage the people to have children.

As long as the imperial court is still collecting the Ding Kou tax, basically don't think about census population.

Then, taking advantage of the establishment of the new dynasty and the renewal of Vientiane, the implementation of the paving into the mu. At this time, the north was completely smashed.

The resistance to the spread into the mu is very small, even in Guanzhong, because of the last food war that Wang Xuanjing engaged, those gate lords and nobles were unable to resist, and in the end they could only agree to Wang Xuanjing's request.

"The household registration statistics of the two lakes have also been sent." Wang Xuanjing sent the national population statistics, "Including Youzhou and Hexi counties, the total population of the world is now more than 13.67 million households, which is still far from the 17 million households during the three-year period of Emperor Yang of Sui. ”

"And due to wars, famines, migrations, plagues, etc., the average population of each household in the Tang Dynasty is not as good as that of Emperor Yang of the Sui Dynasty."

Wang Xuanjing continued: "From the excavation of the Grand Canal, the three expeditions to Liaodong, and then to the rebellion of Liu Heimin in Hebei, more than half of the country's population has been lost, especially in Shandong, Hebei, Youzhou, and Henan, and the population loss is too serious. ”

"However, the loss of Seon is a blessing and a curse, and a large number of people have been lost, so we have little resistance to reform."

Li Shimin sighed: "It's just that the lack of population has also brought a lot of problems, the imperial court has recovered the four counties of Hexi, the hometown of Hehuang, Shuofang Yunzhong, Youzhou, these places are vast and sparsely populated, and a large number of people need to fill them, otherwise these recovered lands are flowers in the mirror, and the moon in the water." ”

"These places are all critical places, and they have to be garrisoned by a large number of Tang people, so they can only be forced to relocate, and when they migrate, give the people a little more benefits, and in the future, they will rely on these people to garrison, and they will have to recruit troops from among them."

"The ministers have already arranged it, and the migrating people have been given tax reductions and exemptions, grain, seeds, and cattle and sheep farming tools." Wang Xuanjing said. Over the years, he has traded with the grasslands, and obtained a large number of cattle and sheep, and in addition to selling some of them, the imperial court has compensated the people who have migrated for the rest.

"After the establishment of the Tang Dynasty, it has been more than 20 years now, but five years before the founding of the People's Republic of China and even until the fourth year of Zhenguan, the world is not very stable, and the birth of babies has improved compared with before. Now that this group of children has grown up, the population gap has eased by one or two. ”

"Since the four years of Zhenguan, the world has been stable, the imperial court has officially abolished the Dingkou tax, and the population has grown rapidly, as long as you wait another four or five years, these babies will grow up, and they can immigrate in large numbers."

"There are 500,000 immigrants in Youzhou, 500,000 in the four counties of Hexi, and 500,000 in the land of Hehuang. In this way, we can initially control the Western Regions and Liaodong, and also prepare for the attack on Liaodong. ”

Li Shimin, like Wang Xuanjing, is vigorously promoting the immigration policy, and even went to Jiangnan in person to press the wealthy families in Jiangnan and ask them to hand over the population in their hands.

"By the way, Your Majesty, there are ministers below who have sent some farm tools, the ministers have seen it, it is very good, Your Majesty may wish to take a look, if you think it is appropriate, you will promote it." Wang Xuanjing said with a smile.

"What farm implement?" Li Shimin was interested.

"Barrel car." Wang Xuanjing said, and then the group left the palace and went to the Weihe River outside the city.

From afar, I saw several waterwheels towering above the Wei River.

The cylinder car is an improvement of the previous waterwheel, the structure is more reasonable, the water lifting height is also higher, and it is more durable than the previous one, which is very suitable for use in Hexi, Hetao and other places.

Farming in the north is very dependent on water, and with this kind of cart, it is much easier to irrigate the farmland.

"Your Majesty, in addition to the waterwheel, you can also use animal power to divert water, which can be used in places where the water flow is gentle, or where you can't build a cylinder car." The officials next to him kept introducing Li Shimin.

These water conservancy facilities are indeed very useful, and Li Shimin was very happy after seeing them, so he issued an edict appointing him as the secretary of the Ministry of Industry, responsible for promoting these cylinder cars and water wheels in the north.

After more than 20 years of recovery, the population of Datang has grown by leaps and bounds, and more than 20 years is enough for a generation to grow up.

After Li Shimin destroyed Tuyuhun, he did not go to war again, in order to give the people a rest and recuperation. He now has to face Liaodong.

Since Emperor Yang of the Sui Dynasty made three expeditions to Liaodong, and the whole world turned against him, Li Shimin was very vigilant about the conquest of Liaodong. As for living in peace with Liaodong, it is basically impossible.

Since the establishment of the Liaodong State, it has continued to expand to the west and south, and the Liaodong Yan State and Lelang County during the Qiandi Dynasty are now occupied by the Liaodong State.

In addition, Liaodong repeatedly invaded Youzhou, which can be said to be a major problem in the northern part of the Tang Dynasty except for the Turks.

When Emperor Yang of Sui conquered Liaodong, Li Shimin also went out with the army, and he saw the mountain city of Liaodong with his own eyes.

Its cities were built on the mountains, which were extremely strong and difficult to conquer, and unlike the Turks, the Liaodong Kingdom was a semi-agricultural and semi-nomadic people. If you really want to talk about it, it is more dangerous than the Turks.

Because of the chaos of Emperor Yang of the Sui Dynasty, if Li Shimin proposed to conquer Liaodong, he was afraid that there would be many people in the Tang Dynasty who would oppose it.

Worried that the Tang Dynasty would repeat the mistakes of the past and embark on the path of the fall of the Sui Dynasty, and at the same time, the casualties during the conquest of Liaodong were also terrifying, so Li Shimin was very cautious on the issue of conquest of Liaodong.

Wang Xuanjing and Li Shimin discussed, it is not easy to send a large army to conquer Liaodong, and the terrain of Liaodong is very clear to Wang, Liaoze is difficult to travel, the logistics pressure is very great, and the mountain city is easy to defend and difficult to attack.

Therefore, Wang Xuanjing advised to enrich the population of Youzhou first, and avoid the army from being requisitioned from the Central Plains or even the south of the Yangtze River. At the same time, because of the strong city of Liaodong, Wang Xuanjing admonished and practiced the practice of the Qianqian Dynasty to pacify the battle of Liaodong, and the troops were divided into two routes, one by land and one by water.

The conscription army is only tens of thousands, and with the help of the fleet, it goes straight to Lelang County. Then the two armies attacked one in the north and one in the south to destroy the Liaodong Kingdom.

(End of chapter)

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