Generally speaking, you can read Five Thousand Years in China and Five Thousand Years in the World. As for the study of history, besides memorizing, you should also learn by comparison, such as what happened at the same time between the East and the West, what connection and influence they have, or the similarities and differences between two historical events, that is, horizontal comparison and vertical comparison. I had it when I was studying the history of World War II. That's how I compare it. I made a big list with events as the axis, including all the important events in the eastern and western battlefields during World War II. Be clear at a glance. I borrowed it from my history teacher after graduation, but unfortunately I never returned it, hehe.