"In addition, if you have used up all your personal information, you must replenish it in time. Otherwise, if I subpoena you, you won't know about it!" Cheng Yu reminded.

If there is no lower slip on the foreign king's side, then his communication will fail. And he can easily judge whether the outer king has received the message based on whether the upper slip in his hand is broken.

As long as the outer king checks the jade slips, the jade slips in his hand will also be broken. If the outer king does not check the jade slips, then the jade slips in his hands will remain intact until the outer king checks them.

Jane is broken.

However, the message on this jade slip is also time-limited. If the other party does not check the jade slip for more than twelve hours, the content on the jade slip will disappear and can be used again.

"I understand!" The foreign king nodded again and quickly put the jade slip away.

This is a good thing. With this thing, he no longer has to worry about not having enough jade slips. After he returns, he will make dozens of them for later use.

"Master, isn't it unfair that you only give such a good thing to the King?" Luo Keya felt a little envious when she saw the King put away the jade slips in excitement.

The foreign king had shown them the use of jade slips, so she also knew that these jade slips were very practical.

And this time, if it weren't for the fact that the foreign king had this jade slip in his hand, how could the foreign king have told Cheng Yu about the situation on his side at any time, and how could the foreign king know about the situation on Cheng Yu's side?

So this is all the credit of this jade slip, and she naturally hopes to have such a good thing.

"What do you want this for?" Cheng Yu smiled.

"If only the foreign king has this thing, if the foreign king has to stay in Baiyang Waichao in the future, but we leave Baiyang Waichao with our troops, then if we don't have this jade slip, how can we report to the young master?

What's our situation?" Luo Keya said.

Jade slips were the best method of communication she had ever seen, and of course she hoped to use this method to communicate.

"That's right!" Cheng Yu thought for a while, and it seemed to be the case, and then said: "Well, I will prepare a set of jade slips for each of you chief elders. Is that okay?"

"Really?" Luo Keya was overjoyed. It would be great if each of their chief elders could have a set of jade slips.

"In order to ensure the concealment of the contents of these jade slips, there are only upper and lower jade slips for communication, and the situation is transmitted one-to-one.

Therefore, these jade slips I give you, except for the communication between us, must not let a third person have the same jade slips, otherwise the communication between us will be seen by this third person." Cheng Yujian.

Luo Keya was so happy, but she had to remind the other person well.

This is a very important key. The communication formations of each set of Jade Slips are different, but these communication formations are very easy to change, so you can make a new set of Jade Slips with slight changes. Such changes

Only he knows it, so it won't overlap with other people's jade slips.

"Please rest assured, young master, I will definitely give them good instructions when the time comes." Luo Keya said happily.

"Anyway, we have to prepare so many sets, so I'll just give you a big gift!" Cheng Yu thought for a while and thought it might be a good thing to give them something, so he said.

"What kind of gift?" Both King Wai and Luo Keya were looking forward to it!

"I have just said that under normal circumstances, these jade slips are divided into upper and lower slips for one-to-one delivery for the sake of confidentiality.

However, this is just one type of jade slip, and there are some more complex jade slips." Cheng Yu said.

"Young master, what do you mean, are there still many-to-many jade slips?" The foreign king's eyes lit up and he said.

"It's almost the same, just one pair of jade slips for many!" Cheng Yu said.

"One to many? Master, please explain in detail!" said the foreign king.

"That's it. I'm giving you this set of jade slips. You can use them to communicate with the defenders at the borders of Baiyang Wai." Cheng Yu said.

"Send a message to the border defenders? But our Baiyang Wai Dynasty has a total of nine border towns. Can the master's special set of jade slips of messages be used to send messages one to nine?" the foreign king asked curiously.

"If that's the case, it's enough for the outer king to hold the upper slip and the other nine border towns to hold the lower slip!" Luo Keya said.

"That's true. If all nine of them hold the slips, you can all see the messages they send you.

However, because the jade slips in their hands are all the same, if you give an order to one of the cities, the other eight border cities will also see it.

It's okay if it's not some important information, but what if the information can only be known to that one city? Wouldn't it be a big deal?" Cheng Yu explained.

"What do you mean, young master, can your special set of jade slips be used to send a message to one of the border towns on its own?" the foreign king asked expectantly.

"Yes, that's why I gave you this set of jade slips. If anyone from the border town enters Baiyang Waichao in the future, you can definitely get the latest news at the first time. I think I will give you this set of jade slips."

It’s all good for me!” Cheng Yu said.

"If there really is such a jade slip, it would be great!" said the foreign king with great joy.

Just like when Xun Te sent them into Baiyang Waichao before, his messenger rushed to Baiyang Waichao as quickly as possible.

But even so, it was delayed for half a month. After he received the news, Special Agent Xun and the others arrived half a month later.

If there are no special circumstances, this kind of summons would be fine.

But if the opponent leads a large army to attack, then this little time may not be of much use.

Moreover, using a messenger to send a message is also more risky. Sometimes the messenger will be discovered and if the summons fails, the consequences will be even more disastrous.

If every border town now has its own different message slips, then there is no need to worry about any delay in any message.

What's more important is that if he has any instructions, he can pass them on to the generals defending the city in the fastest possible way.

For example, if a foreign enemy attacks and a border town he wants needs to be sealed off immediately, if he uses a messenger, the news will come back and forth, and the border town closest to Baiyang Waichao will also waste a month.

When this order was sent to the border city, it had no effect. Maybe their city had already been unable to be defended.

But using such jade slips, he could not only immediately know that foreign enemies were attacking the border town, but he could also immediately order the guards to seal the city without any delay.
Chapter completed!