Technology

According to statistics, one hundred and thity huge earthquake disasters in the world, 90% to 95% of the casualties are due to th...

At the end of seventeen Century, governors entitled Jilin-General and Heilongjiang-General and built station troops to open up wa...

During this period, the majority of the middle and small part of the residents lived on hunting and fishing. In the south part,th...

In the mountains, due to the formation of ancient landslides formed ，the terrain is relatively flat and often used as rural settl...