The Chinese immigrants came from China for more food and freedom.
The white Americans kicked the Chinese out of their homes. They had already established a civilization and started working, but the Americans became jealous. When the Chinese did not move, the white Americans shot at the Chinese and killed 16 and injured 7.
They took the white Americans land, so the white Americans took it back and left them to die.
They were forced to move from their land to new land up state. And if you did not move, the white Americans would take you or kill you. A good thing is they could trade with other groups for fur food pets and so on.
They helped with make the Central Pacific Railroad. They made tools to find gold. Then they drilled holes in to rocks and put gunpowder and fuses in holes. This was very dangerous work.
I wonder what would have happened if all the groups got along?