Du Qingruo once worked at Xinyue Tower; this can be easily verified with a little research.

She revealed that she was the daughter of the Du family and wanted to plead for her father's innocence. She was also arrested and sold into slavery, ending up at Xinyue Tower.

I went to the Ministry of Revenue to check the files, and many details matched up.

Qiao Lian'er had already made preparations for all of this. She had also thoroughly investigated Du Qinglan's family history in the Ministry of Revenue, so she was not afraid of the Crown Prince investigating.

The eldest prince believed that even if Qiao Lian'er had some special skills, it would be impossible for her to do something so thorough and comprehensive.

Therefore, he felt that there was basically nothing to doubt about Du Qingruo.

However, he couldn't tell Du Qinglan that her sister was looking for her, lest it disturb her mindset and affect his plans.

Once the Qiao family is completely destroyed, the eldest prince will have these two sisters serve him together. Thinking of this, the eldest prince felt a surge of pleasure.

Qiao Lian'er had thoroughly investigated Du Qinglan's family background and all her connections a few days ago by examining the Ministry of Revenue's archives and visiting people in her hometown in the capital region who knew the Du family.

The background of this case is that a third-rank official, also surnamed Du, committed the serious crime of treason. According to regulations, his entire family should be executed, but coincidentally, the emperor was going to grant a general amnesty. So, apart from the official's family being executed, all his relatives were sentenced to exile or being sold into slavery.

Du Qinglan's father was a merchant with some scholarly lineage. He held a sinecure of the ninth rank and had no connection with the third-rank official. When the incident occurred and his entire family was investigated, some jealous people reported Du Qinglan's family as well, and they were implicated as a result.

Such things are not surprising, because in the capital, too many families are implicated in the case. As for the women, some were sold to the palace and various government offices to do hard labor, some were sold to military camps, and some were sold to brothels.

However, Qiao Lian'er had some doubts. Was Du Qinglan trying to get close to the Qiao family by following the eldest prince's advice in order to clear the name of her family members who had been wronged?

After the matter was accomplished, the eldest prince granted her wish.

Thinking of this, her expression shifted. If she wasn't mistaken, the whole story had finally become clear.

This includes the cause, motivation, and the purpose to be achieved.

She was grateful to have such a space and this invisibility cloak; otherwise, it would have been impossible to dig so deep.

Because this matter was originally kept extremely secret.

Driven by a strong conviction to clear her family's name, Du Qinglan never stopped once she took action.

Du Qinglan ate dinner at the Qiao family's house. Qiao Lian'er only went into the kitchen after everyone had eaten half of the meal.

"Lian'er, why are you back so late? Come sit down and eat," said Old Mrs. Qiao.

"Something happened that delayed us," Qiao Lian'er said.

"What's the matter?" Boss Qiao asked curiously.

"It seems the authorities arrested the wrong people. I saw that they were about to wrongly accuse an innocent family, so I stopped them and investigated with the authorities. Finally, we found out that the family was innocent, which saved their lives."

As he spoke, he quickly glanced at Du Qinglan's expression.

Sure enough, Du Qinglan seemed to realize something, her face paled slightly, and her hand trembled.

"Our Lian'er is really amazing. She can solve this kind of thing with just a flick of her little finger," Qiao Zhizhi said. "She has saved a whole family. It's a great achievement."

The Qiao family members all praised him.

"It's fortunate that she has the status of a princess and a general. If an ordinary person had tried to stop her, they would probably have been taken away together," said Qiao Laosan.

Everyone agreed.

After everyone finished eating, a family suddenly appeared outside the door, ranging from eighty-year-olds to six- or seven-year-old toddlers, and knelt down in front of the door.