After exterminating the eight Jin merchants who collaborated with the enemy and betrayed the country, Tianqi quickly ordered the Jinyi Guard to strengthen the strict control of the border wall passes, and strictly investigate the infiltration and entry and exit of the Jian's spies.

At the same time, Tianqi and Lin Dan Khan agreed that in the future, all border trade gates between the two sides need to clarify their identities and show the unified tokens of both sides to enter and exit.

Whether it is a Ming merchant or a Mongolian merchant, it is strictly forbidden to engage in any form of trade with Jianlu, otherwise it will be punished as treason.

Lin Dan Khan knew that this move of the Ming State was a very effective means for the Mongols and Jurchens, who were not engaged in production and had low forging capabilities.

Otherwise, the previous king of Shunyi would not have hesitated to start a war in order to open up border trade.

If the Ming court did not promise to inherit the city reward of the Mongolian right wing this time, then it would definitely be able to do so only by means of war.

Therefore, he very much agreed with Apocalypse's proposal, after all, this was a trade blockade against Jianyu, not against the Chahar Ministry.

Moreover, cracking down on the construction is also the responsibility of the Chahar Ministry.

In the past, with the help of the cover of the eight Jin merchants, they could easily enter and exit the border walls of the Ming Kingdom, and they could return to Shenyang by land.

But now, the land route to the north is tightly sealed, and it is extremely difficult to get through the barriers.

Now, if you still want to take the land route, you have to go around to Qinghai, and then pass through the vast Mongolian right flank to enter the relatively safe Mongolian left flank area.

But in this way, at least a few thousand miles more will have to be walked, not to mention the delay, and the risk of passing through the Mongolian right-wing areas controlled by the Chahar Ministry is also not small.

After measuring, the best way is to take the waterway, from the northeast coast of the mountain, preferably the north shore of Dengzhou Prefecture, to smuggle to Liaodong by boat, so that the journey and time are very short, and you can also avoid the blockade of the Ming army and Jinyiwei as much as possible.

However, the situation at sea is unpredictable, and if you are not careful, you may capsize and die at the bottom of the sea.

Moreover, there are many ships of the Ming army at sea, and it is difficult to escape once they are discovered, so it is not as safe as going out of the fort.

But now even the eight Jin merchants have been uprooted, and this safest road has become a dead end.

I don't know why, after so many years, why was it suddenly cut off by the Ming Court? It's so uncomfortable.

But this in itself was a very important piece of information, so the Jianyu spies lurking in the north tried their best to return to Liaodong as soon as possible and transmit the news back to Shenyang.

Moreover, this time the Ming court made a move without warning, and many spies who were protected by the eight Jin merchants were affected, and suffered the heaviest losses in history.

It can be said that since the first Khan asked Li Yongfang to install spies in the hinterland of the Ming Kingdom, the total personnel losses over the years have not been as good as this time.

Because the Ming Kingdom is too erosive, many powerful people have been bought by the eight Jin merchants, as long as they don't make too much trouble, all parts of the Ming Kingdom are almost like no one, all kinds of information are at their fingertips, and there is no danger at all.

Even if you are accidentally caught, you can get it out with some means.

It may be that it is this, there is no sense of urgency, so I let my guard down and was caught off guard, resulting in such heavy losses.

Although this time it hit Jianyu's intelligence agency hard, Tianqi was not very excited, but said to Luo Sigong: "Even our Ming Jinggi is about to become the backyard of Jianyu's spies, and Jinyiwei's duty is heavy and there is a long way to go." ”

"All the spies caught this time must be strictly interrogated, and the spies who infiltrated my Ming Dynasty must be dug out one by one. If you are willing to take the initiative to surrender, according to their merits, they can be given a light punishment, not to blame for the past, or even to be rewarded heavily. ”

"Yes. Wechen took the order. ”

"We have blocked the northern border wall, and the remaining Jianjiao spies will inevitably choose to cross the sea from Shandong and return to the north, and immediately strengthen the surface patrol of the Bohai Sea, and I will issue an order for the governor of Denglai to assist you."

"Yes, Weichen will also strengthen the layout of the northeast coast of the mountain as soon as possible, and make every effort to block the entry and exit of Jianyu and spies."

After receiving the order, Luo Sigong quickly organized the elite Jinyi Wei to go out of Beijing, strengthened the monitoring activities in the east of Beizhili and the coastal areas in the northeast of Shandong, and ordered all ships to register and make a register, and report to the village or the government in time every time they went to sea and returned.

If the ship goes missing, it should be reported as soon as possible, and if there is any concealment, severe punishment will be given.

Those who are found to have concealed a ship or stolen a ship will be treated as a spy of the construction captives, and those who report and assist in the capture of the construction of the spy will be given a heavy reward.

Of course, if you repent and are willing to rejoin the spies who have made meritorious contributions to the Ming Dynasty, the Ming Dynasty will not blame the past, and if you have meritorious service, you will also be rewarded.

After all, almost all of these spies were Han people who were cultivated by Li Yongfang, and it was easier for them to blend into the Ming Dynasty.

At the same time, with the assistance of Yuan Keli, the governor of Denglai, the sea patrol of the Bohai Sea was strengthened.

After this move, it hurt the Jianyu spies who wanted to go back to report the news.

Because they had almost no preparation to take the sea route before, after all, the land route is so convenient.

Now that all of a sudden, only the sea route is the most suitable, so it is natural that you have to make some preparations.

Unexpectedly, Jin Yiwei's reaction was so fast.

It was really smooth before, and I didn't think of danger in times of peace, but now I was caught off guard when I suddenly encountered such a situation.

This also shows that it is not how good Jianyu's intelligence work is, but that Daming's intelligence work is too poor and too bad internally, so they took advantage of it.

As long as Luo Sigong came up with the same means to deal with the Japanese invaders at the beginning, it would not be as difficult as he imagined.

But no matter how difficult it is, for the Jianyu spies, everything that has happened recently in the Ming Kingdom must be passed back as soon as possible.

Because the news of the destruction of the eight Jin merchants alone was an extremely important piece of information, they did not dare to slack off and tried every means to prepare for smuggling from the Bohai Sea to Liaodong.

However, for such an unfamiliar waterway, and it is necessary to break through the layers of blockade of Jinyiwei and the Ming army, the difficulty can be imagined.

When Huang Taiji learned the news, it was already the end of September, and he was not in Shenyang at this time, but led a large army to attack the remnants of Chahar left by Lin Dan Khan on the left wing of Mongolia.

When Lin Dan Khan moved west last year, he only took away the main force of the Chahar department, which was the most loyal to him, and left several departments such as Tumut and Dorot.

At the end of last year, the Tumut Ministry was under pressure from the captives and chose to surrender.

In February of this year, Huang Taiji led the two younger brothers, Dorgon and Dord, to conquer the Dorot Ministry, which was severely damaged and forced to surrender.

In September, tens of thousands of troops were formed to attack the left wing of the Mongols, preparing to wipe out the remnants of the Chahar Department in one fell swoop.

In just one month, Huang Taiji's strategic goal has been basically achieved, except for the headquarters of Lin Dan Khan, who fled to the Mongolian right wing, all the remaining resistance forces on the Mongolian left wing have been pacified, and the road from Mongolia to the Ming Kingdom has been completely opened.