"It's already August in a blink of an eye, but it's still so hot and humid here in Luzon. Fortunately www.biquge.info there are a lot of coconuts here, and this coconut water is really thirst-quenching. Zheng Du held a large chiseled coconut, poured the water inside into the two glasses placed on the table, and then he picked up a cup and handed it to Zheng Sen and said, "Big brother, this cup is for you." ”

This glass cup is produced by Haidafu's glass factory. Nowadays, many of Zheng Zhilong's old subordinates have invested in industry and commerce, and as old people who followed Zheng Zhilong from birth to death, they not only received a lot of financial assistance from Zheng Zhilong in industry and commerce, but also obtained the right to buy some not particularly sensitive technologies from Zheng Sen, glass manufacturing technology is one of them.

Traditionally, the telescopes used by the Zheng family have relied on natural highly transparent crystals. Especially the high-purity natural crystal of Hainan Sheephorn Ridge. However, high-purity and large-scale natural crystals are hard to come by, and the cost of making telescopes is also very high, so if this thing is to be popularized among lower-ranking officers, it is necessary to make high-grade optical glass. Zheng Sen roughly remembers that the glass was burned with quartz sand plus soda ash and lime. Lime and quartz sand are not a problem, they are easy to get, the soda ash problem is a little bigger, although Zheng Sen also learned the so-called "Hou's alkali method" when he was studying in his last life, and even remembered most of the process, but this is useless, because the Hou's alkali method is based on synthetic ammonia, and synthetic ammonia, if synthetic ammonia can be realized, Zheng Sen feels that it is trivial to unify the world or something. As for the other more ancient alkali production methods, Zheng Sen didn't remember anything at all. However, this is not a big problem, because there is still natural soda ash in this world. One of the great advantages of this era is that there are enough natural resources for Zheng Sen to waste, just as Zheng Sen can use struvite directly as fertilizer although he can't make fertilizer today.

Zheng Sen knows that in Henan, there is the largest natural soda ash mine in Asia and the second largest in the world. However, this mine cannot be counted on for the time being, so his demand is not large, and he can completely rely on foreign trade to obtain it.

However, the quality of the fired glass is very problematic. The glass they fired had a rich green color, which was completely incomparable to that of natural crystal, and it also carried a lot of bubbles. Zheng Sen generally knew that the green color of the glass was due to the bivalent iron in the raw material, but he couldn't do anything about how to get rid of these things. He vaguely remembered that in a certain time-traveling novel he had read before, he used the method of passing all the ingredients through a magnet, but experiments proved that the effect of this was actually very limited. In fact, in the glass industry, people remove the green color of glass by adding the right amount of manganese dioxide. Natural manganese dioxide is actually pyrolite, which is also easy to obtain. In fact, at this time, the glass craftsmen in Venice had already mastered this technique, but Zheng Sen did not know these details. Therefore, the glass in their hands is still distinctly dark green. However, the problem of bubbles has been solved a lot, and a craftsman has a whimsical idea to try to actively blow air into the molten glass, and these large bubbles bring out a lot of small bubbles, which solves the problem of this process.

However, there has been no progress on the issue of improving transparency, so the plan to build a telescope out of glass has been in vain. However, this technology is not bad for civilian use. In this day and age, glass products of this quality can still make a lot of money.

Zheng Sen took the cup and drank it all, and then said, "Adu, your performance has been very good for a while. So now, I have one thing for you to do. ”

Zheng Du's eyes immediately widened and said, "Big brother, if there is anything, you just have to tell me." ”

"I'm not going to hide it from you." Zheng Sen put down the cup, and Zheng Du immediately picked up the coconut and poured it full for him.

"You've read my books, especially those about the politics of three generations." Zheng Sen said very calmly, but Zheng Du's hand couldn't help shaking.

"You know, 'Zhou is in view of the second generation, depressed, I follow Zhou'." Zheng Sen said this while looking at his younger brother.

Zheng Du knew, "In view of the second generation of Zhou, I am depressed, and I follow Zhou." These are the words of Confucius. Confucius believed that the system of the Zhou dynasty borrowed the merits of the Xia and Shang dynasties, and he supported the system of the Zhou dynasty. However, Zheng Du also knew that what his eldest brother was talking about was not anything else, the well field system that was blown out of the sky by some later Confucian scholars, but the sub-feudal system. As the second child in the family, he also knows a lot about the current situation in the family, at least, with the territory controlled by the family now, it is really not a problem to establish himself as the king. Even dividing several vassal states is not a big problem. Now that the eldest brother suddenly talks about these things, most of them have something to do with this. In fact, he had a similar guess for a long time, so he quickly stabilized his emotions.

"And in the system of the Zhou Dynasty, the best is feudalism. If there was no Chengkang's feudalism, my China would not be where it is today. Nowadays, the technology at sea has greatly improved, the sea is no longer an obstacle for us, and the expansion of China will continue to turn into summer, which is naturally our priority, and my family will continue to expand in the future. I have discussed with my father, and now this land of Luzon will be divided among you in the future. So, even though you are still young, you have to work hard to learn how to govern a place. And this learning starts with learning how to turn razing into summer. Zheng Sen said.

"The younger brother listens to the eldest brother." Zheng Du Road.

"Do you know what to do about turning this into summer?" Zheng Sen asked again.

Zheng Du nodded and said, "I've read my eldest brother's book, which mentions it." ”

"So what do you say?" Zheng Sen asked again.

Zheng Du immediately replied: "The first step is, of course, to let those Yi people know that they envy Huaxia. Zheng Du said, "These days in Luzon, I have also seen what kind of life those natives live." Even those chiefs had a much worse life than the Chinese in Luzon. Therefore, those natives have always been envious of us Chinese, and they are jealous, and even hateful because of jealousy. Now that our Chinese military is strong, they are afraid that they don't dare to hate, and they naturally envy a little more. In this way, if we teach them Chinese things, are there any of them who are not willing to learn? ”

Zheng Sen listened, but shook his head and said, "Adu, you think things are simple. We have robbed a lot of indigenous land, how can they not dare to hate? And, as long as they are willing to learn what is Chinese, you let them learn? ”

"If you don't let them learn, how can you turn it into summer?" Zheng Du asked.

"Of course, it's not that they can't learn it, but it can't be easy for them to learn. If anything is too easy to get hold of, no one will cherish it. ”