Speaking of Yin Shuangshuang, her current situation is actually quite good. Qinglin County was originally Great General Feng’s territory, and because it’s close to the border where military generals hold high status, Great General Feng has enormous power.

The Prefect above is one of his people, and although the Magistrate comes from an aristocratic family, with Great General Feng pressuring him, he can’t cause much trouble.

Most of Yin Shuangshuang’s neighbors are county magistrates who aren’t from aristocratic families, so finding someone to cooperate with isn’t difficult for her.

The fire wall is simple to build and easy to use; once ignited, even in the cold of winter, people can wear summer clothes indoors and not feel cold. It quickly became popular once spread.

Whether common people or wealthy families, everyone could afford to build it. The commoners, reluctant to use firewood, could warm up their homes by burning it while cooking, ensuring a warm winter.

Yin Shuangshuang thought of these cold places in winter and told the Emperor about the fire wall, knowing the Emperor’s great energy makes promoting anything easy.

Of course, Yin Shuangshuang didn’t directly say she wanted the Emperor to promote the fire wall; she modified her words.

She expressed it as having acquired something good and thought of the Emperor. If the Emperor found it useful, it could be promoted for the common good.

In essence, her words were earnest and seemed sincere, but it was actually just flattering in a secret memo.

When Yin Shuangshuang’s secret memo arrived, it had just snowed heavily in the Capital City, and the temperatures had dropped sharply. The Emperor and General An were warming themselves by the brazier.

Upon seeing Yin Shuangshuang’s memo, the Emperor first laughed, saying, "Yin Aiqing is indeed loyal. Whatever benefit she acquires, she always thinks of me. She even sent the method for this fire wall."

General An reached out to take the memo handed by the Emperor and happened to see the fire wall blueprint inside. He couldn’t help but praise, "The construction method for this fire wall is simple, and according to the memo, its heating effect is excellent.

If this fire wall were promoted, the common people would suffer much less in winter, though it might impact those in the Silver Frost Charcoal business somewhat."

The Emperor casually remarked, "Silver Frost Charcoal has always been a luxury for the wealthy. Using less is fine; what matters is the common people’s welfare."

The Emperor personally promoted it, and the fire wall quickly became known and accepted by the common people across various regions. Although this indeed impacted many Silver Frost Charcoal merchants, leading them to change trades.

However, the Yin Family’s Silver Frost Charcoal business was unaffected, mainly because their main selling point was not the warmth, but the fragrance released when burning Silver Frost Charcoal.

Nowadays, the Silver Frost Charcoal from the Yin Family has become a special kind of incense for many households. Even in summer, it is cut into small pieces, burnt in incense burners for fragrance, genuinely popular throughout the seasons.

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With spring gone and autumn coming, time flies. In the blink of an eye, Yin Shuangshuang’s three-year term was fulfilled.

Qinglin County and Lin County, where Yang Yixuan is located, have become famous counties for sugar production. Every year, merchants come repeatedly, all aiming to buy sugar.

Gao Ya is now incredibly busy, still residing within the county government where she can easily consult Yin Shuangshuang if needed.

Besides, Gao Ya living in the county government serves as a deterrent, indicating that she is under Yin Shuangshuang’s protection, preventing any malicious intentions.

With so many merchants coming, for the merchants’ convenience, Yin Shuangshuang specially requested a batch of cement from the Emperor to reconstruct the roads between the two counties, facilitating the movement of caravans.

During the idle winter days, Yin Shuangshuang sits in an inconspicuous carriage, driven by Yan Yi, leisurely touring Qinglin County. Now, she dares not sit in the imperial carriage gifted by the Emperor.

Each time Yin Shuangshuang rides out in that carriage, she ends up surrounded by people, and before she knows it, the carriage is filled with random gifts from them, leaving her completely unprepared.

As the carriage moves along the deliberately widened roads, Yin Shuangshuang is in a good mood, reminiscing about when she first arrived to take office, seeing the dilapidated Qinglin County where the common people wore rags and looked like walking corpses.

But things have dramatically changed now. The passing common people are dressed in fine cloth, clean and tidy, with good spirits. Each face bears a relaxed expression.

The former corpse-like appearance is nowhere to be seen. All the houses in Qinglin County have been rebuilt, with the people’s first move upon earning money being to build houses.

At that time, many people rebuilt their homes, benefiting those selling bricks and mortar abundantly.

Walking down the street, most houses are two or three-story loft houses, with several tall buildings belonging to the largest inns and taverns in Qinglin County.

These places are the liveliest; those visiting to buy sugar stay in them, where they drink and chat, spreading various news.

Yin Shuangshuang loves sitting in the inn’s private rooms, listening to merchants share small stories and insights gleaned from their business journeys.

Come Again Inn’s owner fled overnight due to fear from Chai Pengfei’s incident, selling the inn cheaply. The inn’s ownership has since changed.

The new owner liked the name Come Again Inn, so kept it unchanged, liked the name Come Again Inn, so he kept it unchanged, refinished the inn again, expanded its area, and built up to four floors.

High-rise buildings were extremely rare in ancient times; hence the four-story Come Again Inn attracted numerous merchants for meals and chats.

Yin Shuangshuang has become a regular at Come Again Inn. Upon entering, the helpful attendant comes to greet her.

In Qinglin County, everyone recognizes Yin Shuangshuang, knowing she does not like disturbing the people, so the attendant discreetly leads her to the usual private room.

Yin Shuangshuang’s private room is on the second floor; she actually prefers the fourth floor, where one can climb high and gaze far, taking in the best views of Come Again Inn.

Unfortunately, her frail body can’t manage the climb to the fourth floor. Surely she can’t have people carry her through an inn; it would be embarrassing.

Yin Shuangshuang’s private room has only a simple curtain for a barrier. Entering the room is merely to avoid disturbances; she comes here to hear news. If it’s too concealed, how could she hear anything?

Currently, merchants are intensely discussing only one topic: Qinglin County and Lin County becoming Upper Counties, with every conversation connected to this in some way.

Yin Shuangshuang holds a teacup, sipping slowly. Her health has improved recently, and her taste buds, numb from the medication, have recovered somewhat, finally allowing her to savor the tea’s aroma.

Voices from outside continuously drift in as Yin Shuangshuang listens intently.

"Speaking of this County Magistrate Yin is truly remarkable. Her ability to make money is unmatched, almost like turning stone into gold. They say the three most profitable businesses under the current Emperor were all advised by County Magistrate Yin."