Since the last time they came out of the top floor of Qingcheng Baiyi Pavilion, Su Yan and Huang Xiaobing's ordinary lives have not had any special fluctuations.

It wasn't until July, when Qingcheng began to sell Yanxin, that they found something to do outside of reading the exercise book and practicing the exercises.

The current Yanxin is sold by a source device shop called Bi Neighbor, and when Su Yan and Huang Xiaobing went to buy Yanxin, they learned that each Yanxin now has an eleven-digit number.

This number is represented by Su Yan's number that has been launched for a while, and this kind of number is simple to write, and everyone accepts it quite quickly.

After Su Yan took out ten taels of silver to buy two push-button messages that were slightly larger than a palm, they also learned their message numbers.

At the same time, the clerk in the shop also gave them a manual, according to the manual, Su Yan and Huang Xiaobing knew that this kind of source device was relatively special, although it was a low-level source device, but it also needed to go through a process of dripping blood to recognize the owner.

After completing the blood confession, they will have a special blood connection with their own words, and then they can directly use their minds to enter words into the words.

Su Yan and the others took the letter and observed it, and found that the surface of the letter was a gray and black metal, with ten digital buttons and a confirmation return button on the front, and there were arrow keys above the twelve buttons.

There is a small hole in the bottom of the body and a button on the side.

After flipping it over, they saw that there was a small cover behind the letter, and when they opened it, they could see the structure of the source device inside, but after opening it, they couldn't understand the structure inside.

On the whole, the size of the whole book is slightly longer than the palm of an adult's hand, and the thickness is roughly equivalent to the thickness of the two palms together.

By comparing the manual, they knew that the small hole at the bottom of the letter was used to input the source gas, and it was usually just a standby waiting to receive the information, and the input of 100 wisps of source gas could last almost a day.

If you want to send a message, a wisp of source qi can send a 100-word message, but if you send a message to someone a minute, 100 wisps will definitely not be enough.

However, this Yanxin has a built-in source gas storage device with a large capacity, which can store up to 2,000 wisps of source gas into it, and can input source gas at any time.

Even if you send a message a minute, more than 1,000 wisps of source qi a day are enough.

When reading the manual, Su Yan found that the manual said: "Due to the limited number of ethereal spirit servers supporting Wanyan Network on the Wanyuan Continent now, each message number can only send one message every thirty seconds, please forgive me for the inconvenience." ’

Seeing this, Su Yan couldn't help but think of the sand sculpture setting that some games can only speak once every ten seconds or tens of seconds, which will undoubtedly make gamers who like to chat very unhappy.

However, the Ethereal Soul server is limited, and this is also something that cannot be helped.

If you feel that this interval is too long, then it is better to cultivate the "Feihong Secret Order" and "Concentric Knot" by yourself and consume a lot of source qi to transmit messages remotely.

However, the manual also says that as the number of Ethereal Servers increases, this time interval will get shorter and shorter, and may eventually drop to once a second.

Well, Wanyuan Continent has the concept of sometimes minutes and seconds, but in order to save materials and source gas, most people only use the most ordinary hourly self-striking clock.

Then, they continued to read the instructions.

The button on the side, if there is source gas in the message, press this button to pop up a small light curtain, and the holder of the letter can see the source gas reserves inside through the light curtain.

In addition, the holder of the letter can also check the information sent by others through the light curtain, and can also check whether the number dialed by himself is correct on the light screen.

If it is correct, you can press the confirmation button to select and send him a message, if the number is not correct, you can also press the back button to delete the number, and then press back to return to the initial interface after the number is deleted.

At the same time, the number stored in the message can also be viewed and remarked here.

The operation on the light curtain is basically operated by the arrow keys and the confirmation device.

Of course, the owner can also operate with his mind, but this will consume a wisp of source qi every minute or two, so it is not recommended to do so than the neighbor's manual.

At this point, the instructions of Yanxin can be regarded as all read.

After the two returned home with Su Huangzhi, they directly took out the message and then added the other party's number, trying to send the first text message.

In the initial test, they found that there was a slight delay in the transmission of messages, perhaps due to the fact that the text message had to be detoured to the nearest Ethereal server and back.

After trying it, Su Yan and Huang Xiaobing were very satisfied with this Yanxin, although there was a slight delay in sending the letter, it was insignificant for people in the same city.

However, if the city where the two sides of the communication are located is far away, this delay may be relatively high, especially now that there are fewer Ethereal Servers.

Su Yan estimated that there might be a delay of about a minute from Qingcheng to Quancheng, but this delay was actually negligible.

Anyway, the other party doesn't know when the sender sent the letter.

Thirty seconds later, the two of them ran to different rooms to test it again, and the information was delivered accurately, and they were relieved.

Su Yan said: "It's okay now, I'm not afraid that I won't be able to find you because of some accident in the future, and if I ride Xiaofei to Quancheng in more than a year, we can also contact us at any time." ”

Huang Xiaobing nodded when he heard this, when the two of them were at home, they would definitely not use the function of this Yanxin, but there was always a time when the two were separated for a short time.

Moreover, even if they didn't leave Qingcheng, now because they wanted to take Su Huangzhi with them, one of them would always stay at home in the morning, and the other would go to the Ten Thousand Scrolls Pavilion to study and work.

For example, those who stay at home with their children can say what they want to eat at noon, and then those who come back from outside can pack up their meals and bring them back.

The next day, they went to write down the letter numbers of the three members of the Xu family and the two brothers and sisters of the Thorn family, so that they could contact them at any time in the future.

Xu Changshou naturally did not lack fifteen taels of silver, and after writing a red book list, Thorn Sheng naturally had the spare strength to buy two Yan Xin.

When he went out to record these numbers, Xu Changshou also gave Su Yan and Huang Xiaobing two thick booklets, which he said were the 'number bibs' that he had just made last month.

When he got this number bib, Su Yan gave Xu Changshou a thumbs up in his heart, there was no text on this booklet, and it consumed little paper, but he asked for two copper plates from others.

I have to say that Xu Changshou is still very good at seizing business opportunities.

Although it seems that it doesn't make much money if you calculate it carefully, after all, there are only one or two thousand people in Qingcheng who can buy Yanxin at the first time.

And although there are tens of thousands of people who can scrape together money to buy a Yanxin in two or three months, even if these people buy his family's number bib, they actually only make a little money.

Moreover, other families can also do this to buy it, so this extra income is actually not worth mentioning.

After another month, Su Yan and Huang Xiaobing discussed, and then the two were temporarily separated, Su Yan went out of Qingcheng to Quancheng and Hongfeng City, found his parents and their little friends, and recorded each other's letter numbers in the number book.

Although his parents had just settled down and had no spare money to buy Yanxin for the time being, Su Yan simply sent them six sets, and then got a lot of favor from his stepfather and stepmother's younger brothers and sisters.

On August 5, Su Yan returned to Qingcheng.

On the same day, his source qi accumulation quietly exceeded 30,000, and he was promoted to the fourth layer of open source, and the source qi that automatically increased every day was one more wisp.