If Li Nan wants to increase his strength now, it is not much to rely on martial arts moves alone, but fortunately, he extracted a rare level exercise "Heaven and Earth Yin and Yang Great Happiness Fu" last time.

Li Nan, who originally became the emperor, was still a little slack than before, but in order to save his life and survive the increasingly difficult adventure world, he began to practice diligently again.

"Yin and yang are together, and they are endless. If there is still one, then nothing is born. Therefore, the solitary yin is not self-produced, and the oligo-yang is not self-contained. It is based on the chaos of heaven and earth, all things are alcoholized, men and women are refined, and all things are born. The common way is that it is thought to be used daily, the true source is repeated, and there is an opportunity for yin and yang to be reversed and used interchangeably. People can refine it, and they can transcend life and death......"

All the exercises that use yin and yang to discuss the Tao, in fact, all schools and schools are similar, and the specific practice and cultivation methods are all in the affairs of men and women, and if you want to make rapid progress, you need to be diligent in exercising the exercises.

In this way, the palace is blessed with its own concubines who are not pregnant, Li Nan practiced hard with the women at night, and meditated and practiced during the day, thanks to his strong physical fitness and ability, the progress can be said to be a thousand miles a day.

While the emperor of the Chinese Empire was working hard, the situation on the battlefield in the north changed again.

After investing 200,000 troops, he originally wanted to defeat the empire in one fell swoop and take advantage of the situation to take the Song State into his pocket, but after encountering the strong resistance of the empire, the voice of opposition to sending troops in the DPRK and China became louder.

After all, Jin Taizong Wanyan Sheng still had some prestige, although many courtiers opposed it, but he still decided to increase troops to the Song State again.

Originally a Liao general, he later descended to the Song Dynasty, and soon after, he was thrown into the arms of the Jin State, and the three-surnamed family slave Guo Yaoshi was ordered to lead the Changsheng army, which had expanded to 100,000 people, into the Song realm.

The soldiers in the Changsheng army are all from the Liao and Han people in the Jin realm, and the combat effectiveness of this army is more than enough than the upper than the bottom, it can be said that it is stronger than the Song army, worse than the Jin soldiers, and most importantly, the military discipline is extremely poor.

When the Jin soldiers crossed the border, it was a pack of wolves for the people of the Song Kingdom, although the Jin soldiers burned and looted, but there were always some survivors, and the Chang Shengjun was more like a group of locusts, and the mountains and rivers were poor, leaving only ruins.

After the addition of 100,000 Changsheng troops, the total strength of the Jin State reached about 250,000, Qinzong transferred back all the troops from the Hebei Road, the Song army division reached 100,000 again, and Liu Yanqing also came to support with 50,000 Song troops defending Tokyo.

Although the Imperial Army had six major legions and a fleet out this time, it did not have an advantage in strength, and the total strength was actually only about 160,000.

Knowing of the changes in the front line, Li Nan, who was very busy, decided to deploy a part of the patrol troops who had been serving as the imperial reserve to the battlefield.

In fact, the reserve system is not unique to later generations, and there were similar rudiments in ancient times.

For example, the army of the Song Dynasty is divided into four categories, namely the forbidden army, that is, the central army, all of which belong to the three ya. The Xiang army is a local soldier and belongs to the states. The township soldiers, who are militiamen, only defend their own localities and do not go out into battle. The soldiers of the Tibetan tribes united as soldiers and defended their places with the method of village soldiers.

Normally, only the forbidden army of the Song State can be regarded as a regular army, and the rest of the box army and township soldiers belong to the reserve, and it is not certain whether the feudal soldiers listen to the dispatch or not.

Song Taizu used Zhou Shizong's method to promote the strong men in the Xiang army to the forbidden army, and those who remained were remnants of soldiers with little combat effectiveness to replenish the number. The township soldiers and the Fan soldiers are not the official army of the country, so I will not talk about him. Therefore, the center of gravity of the armed forces is actually in the forbidden army. In the places where the whole country must be defended, the forbidden army is sent to take turns, which is called "Fanshu".

Now the 50,000 soldiers of Liu Yanqing of the Song State, as well as the 50,000 troops stationed in Tokyo led by Li Gang, are actually Xiang troops and township soldiers from all over the country, and it can be said that the Great Song Dynasty has already exhausted the reserves.

The reserve system of the empire was completely copied by Li Nan from later generations.

Before the First World War, European countries generally established a reserve system, and stored a considerable number of reservists.

After the outbreak of the Great War, Austria sent 4 divisions from the reserve army to participate in the war; Germany sent 29 divisions from the reserve army to the war.

After World War II, many countries in the world followed the path of combining a capable standing army with a strong reserve force, and paid more attention to the building of reserves. The Soviet Union formed a complete management system for the construction of the reserves, which continuously expanded the scale of the reserves, and by the end of the 80s, the number of reservists reached about 25 million.

The United States has always emphasized the importance of reserve force building, and regards reserve force as the primary source of wartime expansion of the active force.

The U.S. Reserve is divided into the National Guard and the Federal Reserve, with about 1.8 million people in the early 90s. The National Guard grew out of the pre-colonial militia of the United States; The Federal Reserve is mainly made up of veterans and is directly under the jurisdiction of the various services. The US reserve forces are not only well-organized, well-equipped, and conduct regular military training, but also participate in various forms of exercises together with the active-duty troops, and once mobilized, they can quickly be put into combat.

During the Zhennan period, it was difficult for the state to support a large number of troops, but it needed an army to maintain local security, so all the soldiers were divided into two, the stronger ones were absorbed by the major legions, and the worse ones became patrol soldiers.

The Imperial Patrol is equivalent to the National Guard and the Federal Reserve Corps of the United States, and some veterans who have retired from the army serve as generals in the patrol battalions.

Today's Chinese Empire has a territory of more than 2,600 kilometers from north to south and more than 1,700 kilometers from east to west, and has jurisdiction over two provinces of Zhejiang, Jiangnan, Jiangxi, Hubei, Hunan, Fujian, Sichuan, Guangdong, Guangxi, Zhancheng, Dali Southwest, Dali, Dali, Jiaozhi Shenglong, and Jiaozhi Donghai, a total of 14 provinces.

In addition, the three state capitals of the Song State, Huainan East Road, Huainan West Road, and Jingnan South Road have also been occupied by the empire, and although the population of the vast empire in the south is small, the total population has exceeded 60 million after occupying half of the Song State.

Western Xia, with a total population of about 3 million, was able to recruit 300,000 to 500,000 troops in many cases because of the characteristics of all the people being soldiers. The Song State had about 100 million people and once had an army of more than a million.

Although the empire did not have the terrifying recruitment rate of the Tangut people, at least there was no situation where the Song State could reach half of the total number of empty salaries, so in addition to the regular army of nearly 200,000, there were about 1.2 million patrols in various places.

More than 600,000 Imperial Patrol troops were stationed on the borders of Dali and Cochin provinces with Chenla, Bagan, and Tufan to defend against these countries, while the remaining half were scattered in the major provinces.

In the face of Song Jin's increase in troops, the Minister of Defense of the Empire, the first-class Zhenguo Gong Luda, the deputy minister, the first-class Huaiyuan Marquis Tyrion, the director of the Intelligence Bureau Varys, the Minister of Foreign Affairs Ludia, the Imperial Inspection Minister, the second-class Dingyuan Marquis Weiluo, the deputy minister, the third-class Anyuan Marquis Li Daocheng and others decided to transfer 200,000 soldiers from the southwest border and 100,000 soldiers from various provinces to reinforce the Huainan battlefield with a total of 300,000 patrol troops.

In this way, the number of troops participating in the war of the three kingdoms became 250,000 in the Jin State, 150,000 in the Song State, and 460,000 in the Imperial Army.