Da Qin: The First Emperor wanted to train me to be the empress

Unfortunately, although she understood some basic principles, the aluminum alloy required for the outer layer of the light bulb was not so easy to smelt.

Even if it is smelted, it is not easy to blow it into the shape of a light bulb.

What's more, students during this period had not considered using electric energy for lighting.

Although there are rumors about the generator in the academy, no one has yet taken it out.

Xu Man is not too anxious about this. Some things require people's wisdom to be opened to a certain extent before they can be successful.

She didn't want to do something stupid that would only encourage others.

Now seeing the limitations of lantern lighting in the palace, Xuman finally began to miss modern electric lights.

It's not surprising that she didn't think of this until now. In fact, at this time in the past, she had basically entered the Academy of Agricultural Sciences.

There is no shortage of anything in the Academy of Agricultural Sciences, so in reality I don’t care that much.

"Your Highness, you are back."

Just when she was thinking about how to guide the students of Xianyang Academy to invent electrical appliances, a voice woke her up.

"Ah, it's Zhang Han."

Xu Man turned around and looked in the direction of the sound, and saw Zhang Han approaching from a short distance away.

Zhang Han nodded: "I am preparing to go to Cuiwei Hall to meet His Highness."

"Has the search of all idle palaces ended?"

When Xu Man heard this, he immediately thought of something and asked with a smile, "Tell me, do you find anything?"

Zhang Han's expression was slightly solemn, and he looked around, and then said: "Your Highness, please change the place to discuss this matter."

"Okay, come with me."

Xu Man didn't say much and took her directly back to Cuiwei Hall.

The personal maids quickly brought tea and water, and then exited after His Highness's instructions.

Xu Man motioned to Zhang Han to drink tea first, and then motioned for him to speak directly. After being with Xu Man for so many years, Zhang Han has become accustomed to speaking directly when he has something to say.

"Your Highness, I have searched all the Xianba palaces, and there are two to three secret passages under five of them."

When Zhang Han said these words, his expression was extremely solemn, "I personally went down to observe, and several of them are used to travel between the interior of the palace."

"And there are three heading towards the outside of Huazhang Palace. I haven't calculated the specific directions yet, and I plan to send people through overnight to see clearly."

Xu Man: "Don't rush to do such dangerous things at night."

"Let people guard the entrance of the secret passage, and it will not be too late to explore again at dawn. Those secret passages that travel inside are probably arranged by some people who lived here in the past."

"No need to worry too much."

Speaking of this, Xu Man's expression became solemn unconsciously.

"Those passages leading to the outside world must be carefully explored, and the enemy cannot be allowed to take advantage of this loophole."

"Please rest assured, Your Highness, I have arranged for people to block the internal passage in time."

Speaking of this, Zhang Han became more confident, "I have also sent people to guard the entrance to the passage leading to the outside world. I will send people down once I get His Highness's permission."

Having said this, Zhang Han's expression became a little more solemn.

He took a deep breath and said truthfully: "Although I have not found any suspicious people in the other palaces, there are some suspicious people among the servants and maids in Huazhang Palace who need to be monitored."

"Then we'll regulate it."

Xu Man heard the meaning of Zhang Han's words and immediately asked, "Are some of them in important positions?"

"Yes, Your Highness, there is one papermaking workshop, two weapons repairing workshops, and two at the Ministry of Agriculture."

"Isn't there one in the dining hall?"

Xu Man was a little surprised after hearing Zhang Han talk about it without mentioning the dining hall.