"The teachers in the Imperial College teach very seriously. I will study hard." Hua Qingcheng responded in a general way.

"Um."

Nalan Yunzhi nodded slightly.

"Qingcheng, it's winter again..."

Nalan Yunzhi hated winter the most. Not only did some people freeze to death every year, but her Feng Lingyan also left her in winter.

"This time of year is the most difficult for me. Due to the snowstorm, some people are displaced, and some people cannot survive the cold winter due to lack of food and clothing. However, no matter how strong my hand is, it cannot resist natural disasters..."

"Your Majesty, your compassion for the people is truly a blessing to them. I have suddenly thought of a way to help them solve their winter heating problem."

"Oh? Tell me about it!"

Nalan Yunzhi just wanted to confide her troubles, but she didn't expect that her princess actually had a solution.

"Make a bed."

"kang?"

"Yes. A kang is a sleeping platform made of bricks and other materials. There is a hole underneath that connects to the chimney, so you can burn a fire to keep warm."

Then Hua Qingcheng briefly explained the principle of the kang.

"Empress Mother, although it is already early winter, the sooner this policy is implemented, the sooner the people can enjoy the comfort of a kang."

"Excellent! This method is excellent. Tomorrow I will arrange for people from the Ministry of Works to go to the Imperial College to learn from you how to make a kang. I will also have this method implemented as soon as possible so that all the people in the north can use a kang."

Having solved a problem, Nalan Yunzhi was in a very happy mood.

"Mother Queen, that was just my rough idea. Tonight I will draw up a rough sketch of the kang's construction to make it easier for the Ministry of Works to actually work on it."

"That's great!"

Nalan Yunzhi nodded with satisfaction.

After Nalan Yunzhi left, Hua Qingcheng went into the study of the space villa and used charcoal to trace the construction diagram of the kang on the computer. She also listed the existing materials that could be used to make the kang based on the national conditions and productivity level of Laifeng Country, and annotated them in great detail.

At midnight, Hua Qingcheng returned to the princess's bedroom.

Seeing Mu Lige sitting at the desk flipping through a book, Hua Qingcheng felt a little warm in her heart. This man was waiting for her again.

"Are you done?"

Mu Lige stood up from the desk and walked towards his young wife who had been busy all day.

"Um."

Hua Qingcheng gave Mu Lige a knowing smile, melting all the endless affection in her heart into that smile.

"Qingqing, it's getting late. You have to get up early for school tomorrow. It's time to rest."

Mu Lige took Hua Qingcheng's hand and wanted to walk towards the bed, but Hua Qingcheng did not move.

"Brother Li, you haven't taught Qingcheng to play the piano yet today."

"Qingqing, you..."

Mu Lige's eyes suddenly felt sore, and a thousand feelings suddenly surged into his heart.

"How could Qingcheng go back on her word about what she promised Brother Li?"

Hua Qingcheng took Mu Lige's hand and walked to the desk. She took down the zither from the stand beside her and asked Mu Lige to teach her how to play it...