There were no modern and developed tools to solve crimes in ancient times. How does the government investigate and solve crimes?

Although there was no relevant special equipment and technical support in ancient times, the government still had a set of good methods to control the crime rate and investigate cases. China was a farming culture under the small-scale peasant economy in ancient times. Everyone's food, clothing, housing and transportation are linked to farmland, and they have strict security and curfew mechanisms. Compared with modern times, the turnover rate is very low.

So the people coming and going around are relatively fixed, and strangers can be found out at a glance. And the Baojia system was relatively sound at that time. If you want to travel far away, you must file with Changbao, so that your path and destination will be recorded in detail, and every official will have relevant records. In this case, people coming and going will soon be officially investigated.

Baojia system is a mechanism for ancient rulers to rule the people through household registration management. It is composed of household registration, and then by household registration. At the same time, Chang Bao and Jia Chang were also set up to implement hierarchical management. This mechanism is often implemented together with the mechanism of sitting together, turning all parts of the country into a big prison.

At the beginning, the left-wing method was established by Shang Yang's political reform, and this mechanism made it impossible to hide any ugliness. Under this regulation, the cost of illegal crimes has greatly increased. If a person commits a crime, all insurance companies or A will be punished. Illegal crime is not a matter of one person, but relates to the lives of dozens or even nearly a hundred people. And everyone reports to each other to ensure that criminals have nowhere to hide.

So if one family commits a crime, the other nine families will definitely report it for their own rights and interests, so it will be much easier for the official to detect it. Mutual supervision, acquaintances commit crimes is basically impossible. Official officials can also learn about the food, clothing, housing and transportation trends of the surrounding residents by asking local parents and parents, or whether there are passers-by, or even who has quarreled with whom recently, and who has a bad relationship with whom recently. Just find out directly from your parents.