Answer:
I bet it's children should be filial to their parents because they were big on children obeying parents espicially in ancient china
One bad thing tha happened was that the Muslims views on Crusaders and Europeans as a people was drastically worsened. And it's obvious why this happened; they came to their lands and wanted to reclaim them despite not having any real and legitimate claim to these lands.
He invented the first water powered cotton mill.