Presbyopia is not a problem that patients will have when they are old, but myopia is different, it is generally caused by excessive use of eyes, and it has existed since ancient times. For example, the old Mr. Du in the textbook everyone loves to draw a pair of glasses for them, that is by no means a joke, he is short-sighted, otherwise he would never be able to write the famous sentence 'The bright moonlight outside the window is suspected to be frost on the ground', and everyone did this to express their reverence.

'Ten years of hard study, one fell swoop' is the wish of every scholar in ancient times, so hard work under the lamp is inevitable. But at that time, there were no electric lights, and before paraffin wax was popularized, candles were made of beeswax, and the price of each candle was as high as hundreds of wen, and a few candles were lit a night, and the living expenses for a month were gone. Therefore, reading under the dim oil lamp is the norm, and myopia is also in a frequent state among scholars, and Deng Guangjian is one of the victims.

The telescope that Zhao Yu brought from his previous life was given to Zheng Yi, in fact, he was still very painful, but he couldn't come back after his dignified words, so he always thought about making another pair, but in this era, the Great Song Dynasty couldn't make glass, so he could only put it down temporarily. Today, when the crystal is found in the jewelry store, the problem is solved.

After watching the jeweler polish two pairs of lenses, Zhao Yu suddenly remembered that the two masters were here, one was tormented by farsightedness, but he still had to review the official documents for himself day and night; The other suffers from myopia, and longs to stick books on his face, but he still 'tirelessly' does not forget to teach himself. So he had the craftsmen polish several pairs of lenses, make frames, and make pairs of glasses for each of them......

"Sir, I'll take a look!" Zhao Yu is also a person who has worn glasses, and immediately knows what Deng Guangjian's problem is. In this era, there is no optometry equipment, the prescription of the glasses is estimated by him, and the reading glasses are easy to deal with, and the big and small points can be improvised. However, myopia lenses are not good, the interpupillary distance and power are not suitable, and you will definitely be dizzy.

"Your Highness. This one is ok. After Deng Guangjian tried on another pair, he finally stopped dizzy and said with satisfaction. This means that Zhao Yu has been prepared for a long time, and has made two more pairs of lenses with different degrees but exactly the same style, which can be exchanged with each other, and after tossing for a while, he finally saved up a pair that can be used.

"Thank you, Your Highness, the old man finally no longer suffers from eye disease!" Ying Jieyan saw that the two of them were done, and thanked him.

"My husband works hard for the country and assists the students. That's what I should do. Zhao Yu hurriedly returned the salute.

"Alas, Your Highness is really smart, you can actually come up with this method to treat eye diseases, and you have never been effective after taking so many pills in vain, it seems that Your Highness does have the talent of a doctor." Deng Guangjian also rarely praised His Royal Highness in person.

"Sir's praise, the students don't dare, as long as they don't worry about me leaving the house without permission today." Zhao Hao said with a smile.

"Your Royal Highness...... "Eating people with short mouths and short hands, of course, it is inconvenient to pursue the benefits of being strict, and only sigh that this child is too cunning. After a little carelessness, he said, "Your Highness, what do you think about the matter of Qiongzhou?" He could only continue to talk about what had just happened.

"Two gentlemen, that's what I'm thinking about...... Zhao Yu told the plan he had been thinking about for many days. If the situation is today, the Mongols will never give up the strategy of unifying the whole country, and sooner or later there will be a battle in Qiongzhou, which is inevitable. ”

"Your Highness. Now that the enemy army is still in the north, the situation has eased slightly, and it has recently been heard that Wen Xiang has reorganized his troops and horses from Meizhou out of Jiangxi. Regain Hoi Chang. Volunteers from all over Fuguang raised at the same time, and the imperial court soldiers and horses also approached Guangdong to recover Zhuzhou County, and it was not impossible to recover Jiangnan! Deng Guangzhuan did not agree.

"Sir, now that the thief chieftain has sat firmly in the Central Plains, all the kings respect him as Khan, and the civil strife will be calmed down in a moment. And the important towns in the south of the Yangtze River have a large army stationed in them, which can be guaranteed. Even if our dynasty can temporarily recover some prefectures and counties, it will fall into different places, and it will not be able to unify its dispatch and command, and as long as the enemy army moves south again, it will instantly collapse and fall back into the hands of the enemy. And the thief chieftain will go south this time in order to seek long-term peace and stability, and he will do his best to extinguish the beacon fires in various places and try his best to hunt down and kill the remnants of our dynasty. That will be an endless situation, and our court is weak, and it will be difficult to gain a foothold on the mainland, and Qiongzhou will inevitably fight! Zhao Yu said that after the recovery of Guangzhou, not only Deng Guangjian but also many people in Fuzhong were blindly optimistic, thinking that they did not need to go to Qiongzhou and wanted to stay in Guangzhou.

"Your Highness thinks it's just a flash in the pan?" Deng Guangjian said with doubts.

"Exactly, His Royal Highness's efforts to run Qiongzhou are to hold the last territory for the imperial court and leave a place for rejuvenation." Ying Jieyan said.

"In that case, it is inconvenient for your subordinates to say more." Deng Guang recommended, but he still reserved his opinion.

"I thought that the defense of Qiongzhou lies in taking the sea as a risk, and the heaviest danger is in the strait, and the two gentlemen think it is right?" Zhao Yu said again.

"Well, exactly!" Ying Jieyan said, "It is the best policy to use the sea as a trench and defend against danger." ”

"Otherwise, I thought that if I wanted to hold the strait, the decisive battle at sea would be the best policy. But now there is a shortage of warships in our commander's army, and the navy is not trained and is not yet available. But the war is approaching, and it is a last resort to defend for the time being. Zhao Yu pointed to the map and said, "And to defend Qiongzhou must defend Baisha, here is the mouth of the Nandu River, and if you capture Baisha, you can go upriver to take the capital city and go deep into the hinterland of the island, and the other cities will collapse in an instant." ”

"His Royal Highness is right, Leizhou is only forty miles away from Qiongzhou, and it only takes half a day to reach Shenying Port when the wind and water are smooth, and large boats can be berthed here, which is convenient for landing on the island, which is the place where soldiers are used. Does His Highness want to build a fortress here and resist the enemy at sea? Ying Jieyan very much agrees with His Highness's opinion, and when he comes to the island from the mainland, he usually lands at Shenying Port and then enters the island.

Leizhou on the other side of the strait is shaped like a peninsula, surrounded by enemies on all sides, and it is difficult to resist the siege of enemy troops. And Shenying Port is fifty miles away from the capital city of Qiongzhou, and there is no danger to defend during it. If the enemy fleet crosses the strait and lands, they can control the port and send a steady stream of soldiers and baggage to the island, at which time they can take advantage of the cavalry to quickly sweep deep into the prefectures and counties, or they can use heavy troops to besiege the capital city and further open the way to the south.

It was difficult for our army to resist the enemy after losing the natural danger, and it was either necessary to defend and consume the enemy's army, or to retreat into the mountains and unite with the enemy to deal with the enemy. However, with the current situation in the army, it is difficult to last long, and it is bound to be broken by the enemy. And Li Tong has always been not on good terms with the imperial court, and whether he can cooperate is a problem, and he must beware of them colluding with the enemy army to betray him. Therefore, it is a good strategy to hold the strait against the enemy at sea and prevent it from landing.

"Sir, I thought that there was no doubt about the fortification of the village, but it should not be based on Shenying Port, but a strong city here!" Zhao Hao nodded on the map.

"Haikoupu?! It's just a small port, so why build a city there? Ying Jieyan looked at it and asked in surprise...... (To be continued.) )