The Xuanwei Army was the army of the imperial court, and they were stationed in Nanyang when they were left here, and it was their responsibility to keep the sea route open, and now opening the sea route is just to complete the errand assigned to them at the beginning. As for the reward, it should be reported to the imperial court and issued by the official family, which is the greatest reward for them.

After a few words from Yang Congyi and Tang Xun, Lord Huang gradually calmed down, although the Xuanwei Army is the Huiyi Guard, and all expenses are borne by the fleet itself, but it is essentially the army of the imperial court, if the imperial court needs it, it can also transfer this army to other places with a military order, it is really inappropriate to reward it so casually.

Besides, now that the Xuanwei Army is on a mission, it is too small to reward the private rewards for winning the battle, it is better to report these deeds to the court after going back, and the Xuanwei Army will be rewarded, and as the commander of the Xuanwei Army, he also has a light on his face.

So in the end, Lord Huang asked Yang Congyi to verbally reward Xue Wang and others, telling them that they would do a good job in Nanyang, and the court would not forget their achievements.

The fleet returning from the West was invited by the king of the Srivijaya Kingdom the next day, and Lord Huang, Yang Congyi, Tang Xun and others were invited into the palace as guests.

The summer monsoon in the South Seas has begun, and it will become stronger in another month or so, when the time comes, thousands of miles of stone ponds, storms emerge, thousands of miles of Changsha, typhoons turn over the sea, and the fleet will be in trouble when it returns north. However, the other fleet led by Master Dai did not return on time, and Yang Congyi and others had to wait in the country of Srivijaya as agreed.

The king of the Three Buddhas and the forces of the three major families are getting more and more entangled, and Xue Wang, as the envoy of the Great Song Dynasty to stay in the Three Buddhas for a year, has been co-opted by both sides.

Now that the mission fleet has returned, the two sides have suddenly quieted down, after all, it was the Great Song Dynasty mission that came forward to adjust, and they want to give this face, because the Great Song Dynasty is not far from the Three Buddhas, and the Western Ocean is such a dangerous place, they can come and go freely, and what is the sea in the north.

Therefore, the fleet stayed in the Srivijaya country for half a month, and the treatment was not the same as before.

The fleet that stayed in Tianzhu came back after half a month, and they went around from East Tianzhu to West Tianzhu, and successively traded with seven or eight countries, and harvested a lot in Tianzhu, and all the goods they brought were snapped up, in exchange for countless gold, silver, jewelry, medicinal materials, and spices.

The two fleets were integrated, enough supplies were replenished, and after arranging for the Xuanwei army to stay, they took the envoys sent by the king of Srivijaya and set sail north while the monsoon was not too strong.

The route back to the north was slightly adjusted, and instead of directly crossing Wanli Shitang, it took Champa as the midpoint, and the fleet sailed directly north, crossing the sea area with fewer islands and reefs, and reaching the south of Champa 20 days later.

After a heated discussion, Lord Dai rushed to Zhenla alone with a warship, while the fleet went north to Vijaya, the capital of the city of Zhancheng, while replenishing fresh water and supplies, while waiting for Lord Dai to catch up after the envoy to Zhenla.

The Great Song fleet in Vijaya received special courtesy, because a year earlier, the envoy of the Champa State went to Lin'an to get in touch with the Great Song Dynasty and established a clear vassal relationship, becoming the first country in the Indochina Peninsula to formally establish a vassal relationship with the Great Song Dynasty.

The fleet stopped in the city of Zhancheng into the Great Song Dynasty's own harbor, not far from the seaside land of Vijaya, a year by Zhang Biao led the Xuanwei Army to build a small town, in addition to the Xuanwei Army in the town, there are nearly a thousand people and businessmen who moved from the Great Song Dynasty, the reclaimed land, a piece of buildings, all show the vitality of the Great Song Town.

Zhang Biao has grown a lot this year, he was originally just a headcatcher, but now he is leading a thousand Xuanwei troops, and he can also make it clear, and the military discipline and training that the army should have have not been abandoned because of the construction of a small town and the reclamation of land.

Looking at their military drills, Yang Congyi was happy in his heart, there were hundreds of people from Taihu County, Zhang Biao was considered to be a leader, looking at his strength, if he had the opportunity, maybe he would go further in the future.

The fleet stayed in Champa for half a month, and Lord Dai only sent out to catch up with the fleet waiting for him in Champang.

When the envoys of the Great Song Dynasty came to Champa, they had to have a relationship with each other, and they were carefully entertained, and it took a few days.

More than 20 days later, the fleet left Champa with envoys from Champa, Chenla, Srivijaya, Tianzhu, and Seljuk, and sailed north.

A few days later, the fleet arrived in Guangzhou via Qiongzhou.

Because the fleet was full of goods and had to continue to go north along the coast, and the supplies on board were limited, the envoys and distinguished guests of various countries had been tossed around the sea for a long time, and they were already exhausted, and Dai Cong had long been tired of life at sea. Therefore, under his leadership, the envoy team of various countries all disembarked and landed in Guangzhou, temporarily resting and recuperating in Guangzhou Mansion, and at the same time quickly delivered the news of the visit of the envoys of various countries to Lin'an, waiting for the arrangements and instructions of the imperial court.

Lord Huang has had enough of the life of wandering on the sea for more than a year, and now he finally returned to the land of the Great Song Dynasty, and after explaining to Tang Xun, Yang Congyi, and Zhao An, he immediately landed in Guangzhou with his men and horses, and after a little breathing, he took the lead in returning to Lin'an.

The Huiyi fleet decided to rest outside the port of Guangzhou for a few days, it is already June, the storm at sea is raging, and then continue to go north after the next storm passes, it is safer, if the fleet is in a hurry to have an accident at home, it will be too wronged, since it has returned to the Great Song Dynasty, it is not in a hurry to spend a few days.

As soon as Yang Congyi, Tang Xun, and Zhao An discussed, they determined the itinerary of the fleet, lowered the anchor and lowered the sails, and waited for the storm to appear.

During this period, Tang Xun personally took two ships full of spices to dock in the inner harbor of Guangzhou, and she wanted to know how much the spices from Tianzhu and the Western Regions that she had brought back with great difficulty were worth.

In three days, the two ships of spices were snapped up, and as for how much money was sold, it was not clear to calculate for a while.

Looking at the dense numbers and huge accounts, Yang Congyi felt sorry for Tang Xun.

Because the value of spices is too high, ordinary people can't afford to consume, not many businessmen can buy more than 100 catties at a time, so among the buyers who buy spices, businessmen only account for a few, and the most buyers are restaurants and wealthy families, but almost all of them buy in bulk, they buy dozens of catties today, buy them tomorrow, and then come to buy again.

There are many kinds of spices, more than 20 kinds, each spice has a different value, and the selling price is naturally different, so that the records of the running account are dazzling, and it is roughly estimated that there are thousands of transactions in three days.

"Brother Yang, you just look at the excitement like that? Don't come to help yet. Tang Xun checked the accounts, looked dizzy, and when he looked up, he saw Yang Congyi sitting on the side and drinking herbal tea leisurely, his brows twisted, and he was immediately unhappy.

Yang Congyi took a sip of herbal tea to suppress the shock, looked at her and replied unhurriedly: "If you can't do this, the account has not been settled yet, and we have to lie down tired." ”

Tang Xun threw down the account book and didn't want to pay attention to him in anger.

Yang Congyi took a cup of herbal tea and handed it over: "I am in Baghdad, the capital of the Seljuk kings, and I learned a counting method, which is convenient for bookkeeping and simple to calculate. ”

As soon as she heard that there was such a method, Tang Xun naturally didn't believe it, she had been in Seljuk for so long, why hadn't she heard of it. However, when he thought that he was busy with trade all day long, how could he have time to understand Seljuk like Yang Congyi, he immediately became a little suspicious. She took the herbal tea and asked with some suspicion: "What counting method is really as easy as you say?" ”

Yang Congyi didn't speak, but picked up a pen and wrote down ten Arabic numerals from zero to nine on the paper. After finishing writing, he looked at Tang Xun and asked with a smile, "Do you know what this is?" ”

Tang Xun naturally didn't know, looking at the circles on the white paper, the circles with tails, and the hooks and crutches in each middle, he asked blankly: "What is this, what kind of ghost drawing is it?" ”

"You put away the ledger first, anyway, if you have time today, I'll teach you this counting method from an exotic land." Yang Congyi said, helping to put away all the account books on the case.

Then he pointed to a number on the white paper and said, "These ten symbols are ten numbers, one, two, three, four, five, six, seven, eight and nine, plus a zero." You may ask, why is there no ten? Ten here. As he spoke, he raised the pen and drew a vertical stroke, and then drew a zero.

"It doesn't seem to be easy, it's a little more complicated to write." Tang Xun looked at these crooked symbols and was disappointed.

Yang Congyi smiled and said nothing, drew two verticals, and explained: "This is eleven. ”

Then he drew another vertical and said, "This is one hundred and eleven." ”

Then he drew a vertical and said with a smile: "This is one thousand one hundred and eleven." ”

Look at Tang Xun, who is gradually becoming interested, and draw a vertical again: "This is 11,111." ”

"This exotic number does not have an advantage when the number of calculations is smaller, but as the number of calculations becomes larger, its advantage will become apparent."

"It's interesting to watch. A few vertical bars can represent such a large number, but isn't it even more confusing to write it like this? Tang Xun looked at the four vertical bars and couldn't understand it.

On a new piece of paper, Yang Congyi wrote down the five numbers from top to bottom in Arabic numerals: one, eleven, one hundred and eleven, one thousand one hundred and eleven, and eleven one thousand one hundred and eleven.

After writing, he put down the brush and asked, "Can you see any difference between the five numbers?" ”

Tang Xun immediately replied: "The higher the number, the more symbols. ”

"Yes, it's obvious, eleven is one more symbol than one, and one hundred and eleven is one more symbol than eleven. We call a number represented by only one symbol a single digit, a number represented by two symbols called a ten-digit number, a number represented by three symbols called a hundred-digit number, a number represented by four symbols called a thousand-digit number, a number represented by five symbols called a thousand-digit number, and so on, followed by a hundred thousand, a million, a million, and a thousand. The number of digits is the basis of these symbolic numeric counts. Next, let's look at a few more numbers......"