Bai Yixiu said that he had a very big plan for the future. "Yes, only by repairing the road can we exchange needed goods. For example, litchi in the South will taste bad in the north because of the long journey. If we can repair the road and transport the specialties of the south to the north, wouldn't we exchange needed goods?"

The empress frowned when she heard Bai Yixiu say this, "Yixiu, it costs people and money to transport litchi all the way from the south to the north. Those imperial historians and historians are expected to talk nonsense again. Your father and Emperor attach great importance to these reputations. Ah, you'd better say less in the future."

Bai Yixiu felt puzzled, scratched his head and said in doubt: "Waste people's money? My son thinks this is bad. My mother, our country pays for road construction, and then transports the local tropical fruits that can't be eaten to the capital for sale, so that the local people can get more income and make life easier at home. Otherwise, the fruits can't be sold, can't be eaten, and can only rot in the end. Isn't it a pity?

In addition, people need to be escorted along the way to the capital. People can earn a penny and support their families through transportation. Finally, those businessmen can afford to transport tropical fruits to the north. They are all rich people in the north. Powerful people enjoy the delicious fruit.

Businessmen earn money, the state collects taxes, fruit farmers earn more income, and transportation people have jobs. Why does this become a waste of people and money and extravagance and waste in the mouth of the imperial censor? "

"This... The empress heard her son's words and was speechless. She found that what her son said was reasonable!

Emperor Kangming also touched his beard, thought carefully, smiled and nodded, "well, Yi Xiu makes a lot of sense. Why didn't I think of it when those historians said it would cost people and money? If those historians say it again next time, I'll refute it with these words."

The Crown Princess listened carefully. She hadn't interrupted before. At this time, she finally had the opportunity to speak. She whispered, "father, Queen Mother, the focus of discussion is to study a new thing to build roads and improve the disadvantages of mud roads, and then the transportation of agricultural products and commodities!"

Hearing this, the empress and Emperor Kangming laughed, "ouch, it's really off the subject. Yes, it's appropriate to repair. What your sister-in-law said is that it's impossible to build all the stone roads like the capital. I'll tell you this clearly."

"The cost of stone road is too high, and it doesn't meet my requirements." Bai Yixiu smiled proudly. "Some of my craftsmen have developed a kind of soil, mixed it with water and sand, and paved it on the ground, so they can build a smooth road."

"Is there really such a thing? Is it expensive?" emperor Kangming was interested. It would be great if he could build roads cheaply and quickly!

Bai Yixiu shook his head. "It's not expensive. In fact, it's a pile of stones fired in a special way. The cost is less than 10% of the stone road, and the transportation is convenient and easy."

Hearing this, Emperor Kangming was particularly interested and hurriedly asked, "is there a finished product now?"

If it was before, Emperor Kangming didn't believe that Bai Yixiu could make good things, but the appearance of mirrors and glass made emperor Kangming know his son again.