source 25

http://www.mnsu.edu/emuseum/prehistory/china/early_imperial_china/han.html
This is more information about the Han dynasty. I could not find who was giving out this info but i agree with it.

source 24

http://en.wikipedia.org/wiki/Military_history_of_China
The information is from ^ Liang, Jieming (2006). Chinese Siege Warfare: Mechanical Artillery & Siege Weapons of Antiquity, pp. Appendix D. This is about the military of china through the years.

source 23

http://en.wikipedia.org/wiki/China
This is general information about china that i thought might help me out. i couldnt find the source of this information. I agree with it.

source 22

http://www.travelchinaguide.com/china_great_wall/history/northern-and-southern-dynasties/
I couldnt find who wrote this information but it is about the history of the great wall. I agree with the information.

source 21

http://en.wikipedia.org/wiki/Defense_of_the_Great_Wall
I cant find who wrote this information but it is about the battles over the great wall. I agree with this.

source 20

http://www.great-wall-marathon.com/Default.aspx
This is from CNN doing a story about the great wall marathon.

source 19

http://factsanddetails.com/china.php?itemid=39&catid=2&subcatid=2
This info is from 2008 Jeffrey Hays. And it is about he history of china.