"It's a simple ......!"

Zhao Yin thought for a moment and continued: "The mountain stone is hard, if all of it is dug by manpower, it will really delay time, so it is better to use ** instead!" ”

“**？”

Lin Wu looked at him suspiciously.

** is the most powerful weapon of Datang, although he participated in the development of **, but he did not dare to use it at will.

"That's right, when you turn around, your majesty will send a professional team to follow you, and when you need to open the mountain, you will send them over!"

Zhao Yin understood what he was worried about, so he said to let Li Er send a team over.

After all, the craftsmen who build the railway now do not know how to use **, if it is not used properly, the consequences can be very serious!

"Good! Thank you, Master Pony! ”

The matter was settled, and Lin Wu gave up.

And Zhao Yin was not perfunctory to him, and went to find Li Er early the next morning.

"Why did you come so early today?"

As soon as the early dynasty was dispersed, Li Er met Zhao Yin on the way to the imperial study.

"The princess misses her father and mother, so the son-in-law accompanies her into the palace to have a look!"

Zhao Yin said with a smile.

"Then why don't you see Changle?"

Li Er looked around, but he didn't see the shadow of Princess Changle at all.

"The princess misses her mother and goes directly to the Lizheng Palace, and the son-in-law has something to report to His Majesty, so she came over!"

Zhao Yin still has that hippie smile.

"This girl, don't you want to see her father first......?"

Li Er deliberately grimaced to express his dissatisfaction, and then seemed to remember something, and continued to ask: "You just said that you have something to report?" What's going on? ”

"It's the railroad that has a problem during construction!"

Zhao Yin didn't hide it, and opened his mouth directly.

"What? Got a problem with the railroad? ”

After Li Er heard this, his jaw fell in shock.

You know, he has high hopes for this train, and if he can't continue to build it, all his hopes will be in vain!

"Your Majesty doesn't have to be nervous, it's just a few minor issues!"

Zhao Yin hurriedly explained.

"Whew......! Can you kid finish the words all at once, but I'm scared to death! ”

Li Er patted his chest and let out a long sigh of relief.

"That's right! During the construction of the railway, it is inevitable that there will be rocks, which used to be dug by the supervising manpower, which delayed a lot of time! ”

"Well, that's right, it's a delay, but what other way is there?"

"So the son-in-law suggested that they use **!"

"No, there will be so many people in prison, what if the formula of ** is leaked?

Li Er waved his hand and refused directly.

Now only he Datang has artillery and ground buds, so he can smoothly sweep away the surrounding countries, but if the formula of ** leaks, Datang will be in danger!

"Your Majesty don't worry, we can draw a few people from the artillery team and let them form a railway team to temporarily assist in the construction of the railway ......!"

Zhao Yin and Li Er walked towards the imperial study, and said: "They are familiar with the use of **, so that it will not be dangerous, and this ** will not fall into the hands of others!" ”

"Well, it works!"

After listening to his explanation, Li Er's expression finally softened a little.

"Moreover, the son-in-law recently asked the arsenal to develop a smoke-free **, its composition is much more complex than the previous one, and it is not easy to crack!"

The two went to the imperial study room during the conversation, and Zhao Yin was relieved to say the core content.

After all, there are many people in the Imperial Garden, so it's better to be careful!

"Smoke-free**?"

Li Er heard this word for the first time, and couldn't help but be a little puzzled.

"That's right, this smokeless** is more powerful than the previous ordinary**, and with a lot of added chemicals, it's almost impossible to crack!"

Zhao Yin explained briefly.

"So, we're going to switch to this smoke-free ** in the future?"

Hearing that it would not be cracked, Li Er was finally relieved.

"If the raw materials are sufficient, they will all be smoke-free ** in the future, but black ** will continue to be produced in case of emergency!"

"Okay, that's it!"

After the matter was settled, Empress Changsun also sent someone to call the two of them over for lunch, as for who would lead the railway team, Zhao Yin didn't want to worry about it, anyway, he had already solved the big thing.

"Yin'er, you try this, this is a first-class yam, which is fired with the yam you sent a few days ago!"

In the Lizheng Palace, Empress Changsun personally served Zhao Yin with dishes.

"Thank you, Queen Mother!"

Zhao Yin happily accepted it and didn't think much about it.

"Try this again, this is the first black stewed chicken!"

Empress Eldest Sun scooped two more spoonfuls of soup and handed it to him.

"Thank you, Queen Mother!"

Zhao Yin took it with both hands, took a sip, and felt that the taste was not bad.

"And you can also try this ginger roasted dog meat, eucommia roasted pork loin, and fish bladder and pig's trotters!"

Empress Eldest Sun introduced the dishes very enthusiastically.

"Uh......!"

This couldn't help but make Zhao Yin speechless for a while, and the chopsticks in his hand also paused.

Because he tasted it carefully, he found that these dishes have the effect of tonifying the kidney!

Coupled with the meaningful smile of Empress Eldest Sun, he seemed to understand something in an instant!

"Yin'er, don't get me wrong, the queen mother just thinks that you have been married to Changle for a year, but her belly is still ......!"

Empress Eldest Sun wanted to speak and stopped, but everyone understood what she meant.

"The queen mother ......!"

Hearing this, Princess Changle's pretty face turned red.

"The queen mother, the son-in-law and the princess set out to fight in the north as soon as they got married, and there are many things to deal with after they come back, so ......!"

This topic embarrassed the cheeky Zhao Yin.

Because not only Princess Changle, but even his new eldest grandson Yujia and Hou Qingli's stomachs did not move.

This can't help but make him start to doubt himself too!

"Yin'er is busy, and the queen mother knows it, so these dishes are for you to replenish your body!"

Empress Eldest Sun also felt a little embarrassed, and hurriedly gave herself a round.

In fact, she can't help it, if she wasn't so anxious before, but now after all, the concubine has begun to take concubines, if Princess Changle has an eldest son at this time, her status will be even more stable!

"yes, you kid really should eat more!"

Li Er, who was sitting on the side, didn't speak all the time, but now he finally held back a smile and reluctantly spoke.

"Thank you, father, queen mother!"

There is no way, Li Er has already spoken, he can only respond.

After an embarrassing lunch, Zhao Yin and Princess Changle took a carriage home together, and when they arrived at the Horse Mansion, Princess Changle was directly stuffed into the bedroom.

"You...... What are you doing? ”

Princess Changle clasped her hands tightly on her chest.

"What did the lady say I was going to do?"

Zhao Yin squinted her eyes and walked towards her like a wolf grandmother.

"Now it's blue and white, you...... Do you have nothing to deal with? ”

Princess Changle was forced by him to retreat one after another, and finally sat directly on the bed.

She had always flaunted her martial arts before, but after the night before Zhao Yin's concubine, she was scared and didn't dare to shout anymore.

She also wondered all the time, why this kid was so powerful all of a sudden!

"The thing that this horse has to deal with now is to get rid of you, so that your father and mother will think that I have a problem!"

Zhao Yin said bluntly.

"Ah......h

Then, except for the screams of Princess Changle in the room, the two did not have any conversation.