10th Source

1. http://www.google.com/search?q=han+dynasty&hl=en&safe=active&tbs=tl:1&tbo=1&ei=A7UNSvq-JY3EMbWjuaQG&sa=X&oi=timeline_result&ct=title&resnum=11
2. There is a lot, different sites with different sources
3. There is a lot, different sites with different sources
4. Its a timeline of the Han Dynasty
5. Yes
6. Because the data looks valid and some of the sites are very reliable