After Duoduo retreated, Zhu Cihong ended his imperial expedition and led his army back to Nanjing.

The capital of the country cannot be without a king for a day, especially under the premise of not supervising the country to handle government affairs.

In these days, the important recitals were sent to the front line in Shandong by a special person after the cabinet vote, and Zhu Cihong was in the imperial review of Zhu Zhu.

But this is not a long-term solution after all, the Son of Heaven should still sit in the capital and make the subjects of the world feel at ease.

It is enough for Shandong to have Gao Jie and Qin Gongming.

After returning to the palace, Zhu Cihong was not idle, but summoned Lu Zhenfei, Gao Hongtu and others to analyze the Shandong War.

Although the Battle of Shandong eventually ended with the withdrawal of the Qing army, the whole process was not easy.

Although the Qing army was helpless against the fortress group, it filled in the trenches and broke through the trenches and directly attacked the city.

This is due to a combination of factors.

First, the specific people did not understand Zhu Cihong's intentions in a good way, and only regarded the trenches as a tool to block and delay the advance of the Qing army.

In fact, the real essence of the trench is that it can provide fast and effective support, and block the enemy's attack in a dynamic defensive way.

However, in the Battle of Shandong, the communication support between the various sections of the trenches was insufficient, resulting in the Qing army being able to find a key breakthrough.

This is an area that will focus on improvement in the future.

Second, there is also a problem with the location of the trench digging.

The location chosen by the Ming army to dig the trenches was the connecting line between the forts, which led to the limited support that the forts on both flanks could give to the trenches when the Qing army filled in the trenches and advanced forward.

If the trenches are dug into arches and excavated in multiple layers, the bastion can cover a larger area and provide more support.

These are all lessons learned.

Zhu Cihong never thought that he could defeat the Manchus overnight.

Even this new defense method needs to be tested in actual combat.

Doesn't that expose the problem?

It's not terrible to expose problems, as long as you can learn lessons and improve on them, you will make progress.

Tactics are dead, people are alive.

Through continuous improvement, it is believed that the Ming army will become more and more comfortable in the process of resisting the Qing army.

Of course, there are many positives.

For example, the use of six-pounder guns and twelve-pounder guns.

This new artillery has proven to be stronger than the Hongyi cannon in many ways.

For example, the rate of fire, such as the reload method, the reload speed.

It is the most proud power of the Hongyi cannon, and it is not stronger than the twelve-pounder cannon.

As for the 10,000 enemies and explosives, they shined even more, killing and wounding many Qing troops.

Zhu Cihong is very pleased that the establishment of the Firearms Department has still achieved results.

Of course, good places need to be rewarded, and Zhu Cihong ordered Gao Hongtu to make persistent efforts to equip the whole Ming army with new guns and artillery.

After the two retreated, Zhu Cihong moved to the imperial garden.

Of course, he did not come to admire the flowers and plants, but to inspect an important task.

At this moment, all the gardens have been demolished, and the land has been plowed again.

It can be said that the entire Imperial Garden is now a piece of farmland.

There are two things growing in the farmland – potatoes and sweet potatoes.

Needless to say, sweet potatoes have a more well-known name – sweet potato.

Whether it is potatoes or sweet potatoes, they were introduced to the Ming Dynasty in the last years of Wanli.

It's just that these two things have not been officially promoted, and it was not until the Kangxi period of the Qing Dynasty that they were planted on a large scale.

As we all know, the end of the Ming Dynasty encountered the most severe climatic conditions of the Xiaoice period.

During this period, the weather was extremely cold, coupled with the drought, the grain harvest in the whole north was serious, and there was a famine, which led to the surging peasant uprising in the Chongzhen period.

In the end, Beijing was broken by Li Zicheng, and the Manchu Qing took advantage of the contradiction between Wu Sangui and Li Zicheng to gain profits, and took the opportunity to enter the customs to steal the fruits of victory, and picked peaches in vain.

From the analysis of meteorology, the climate gradually warmed after Shunzhi, and the Xiaoice River completely ended during the Kangxi period.

The so-called "prosperous Kangqian era" is just because the Xiaoice River is over, and God appreciates the face.

Of course, in addition to this, the large-scale promotion of potatoes, sweet potatoes and even corn is also important.

In feudal times, feeding the people was the most important thing.

Because land annexation could not be solved by successive dynasties, large-scale peasant uprisings broke out at certain stages.

The Manchu Qing Dynasty relied on the large-scale popularization and planting of potatoes, sweet potatoes, and corn to solve the problem of eating for the common people, and this gave rise to the so-called "prosperous Kangqian era".

The land is not enough, and the yield is to make up.

During the Manchu Qing Dynasty, most of the land was also in the hands of the landlords, but the population could grow from tens of millions at the end of the Ming Dynasty to hundreds of millions at the end of the Qing Dynasty.

Since the Manchu Qing Dynasty could promote potatoes, sweet potatoes, and corn, Zhu Cihong could naturally do it too.

However, as the first batch of experiments, Zhu Cihong is ready to try the cultivation of potatoes and sweet potatoes first.

This is mainly due to the close proximity of potatoes and sweet potatoes to be planted.

Potatoes are generally planted in February or March and harvested in May and June.

Sweet potatoes are planted in mid-to-late April and harvested in September.

Potatoes have now been planted for more than two months, while sweet potatoes have just been planted.

As for maize, it should be sown at least after mid-May.

In order to stagger the timing, Zhu chose summer sowing, that is, sowing corn in June, so that the harvest should be possible in October.

Among the three drought-tolerant and high-yield crops, Zhu Cihong is most optimistic about potatoes and corn. The main reason is that these two crops have a shorter growth cycle, while sweet potatoes take a longer time to grow.

Of course, Zhu Cihong will do his best to promote these three crops. It's just a chronological difference.

Try to promote potatoes first, followed by sweet potatoes and corn.

As long as the problem of eating for the people is solved and the demographic dividend is obtained, then the number of people alone can crush the Manchu Qing Dynasty.

Relatively speaking, the north is more suitable for growing these three high-yield crops. But that's not to say that the South can't be planted.

Guizhou and Yunnan are very suitable for growing potatoes and sweet potatoes. As for Sichuan, if it is taken down, it can also be popularized and sown on a large scale.

Huguang, Jiangxi and other places are still good at planting rice. After all, it is impossible for a country to survive on potatoes, sweet potatoes, and corn alone, and proper rice reserves are still necessary.

In another month or two, the potatoes will be harvested, and Zhu Cihong really wants to see how much the first batch of potatoes can be produced.

Although he knew that the yield per mu of potatoes beat all the crops of this era, he really didn't know what the actual yield was.

But Zhu Cihong has secretly made up his mind that as long as the actual yield per mu of potatoes is past, he will immediately order large-scale promotion.

In any case, this is also a great thing for the benefit of the country and the people, and there is no reason to put it off.

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