Later Jin was a group of people who lived a long time ago in a place called China. They were in charge of that place between the years 1616 and 1636. They were called Later Jin because there was a group called Jin that ruled before them, but they weren't the same group of people.
The Later Jin people had a leader called Nurhaci. He was very good at making his people strong and organized. He made sure that everyone had jobs to do and that they were all working together to make their place better.
Nurhaci was also very good at fighting. He trained his people to be good fighters too. They had special weapons like bows and arrows, swords, and even guns. They would go out and conquer other places, but they would also make peace with them sometimes.
The Later Jin people were also very good at making art, music, and other things. They had a lot of nice buildings and clothes that they made. They also had their own language and writing system called Manchu.
Eventually, the Later Jin people lost their power and control. Some other group came and took over. But they still had a big impact on the history of that place, and people still remember them today.