Changes

===Archaeological===

===Archaeological===

The neolithic site of Yangshao in Henan Province was excavated by Swedish archaeologist Johan Gunnar Andersson in 1921. The Yangshao culture thrived along Yellow River and cultivated millet from about 4900 to 3000 BC. Silk was produced and pottery was fired in kilns dug into the ground. The bones of domesticated dogs, cattle, sheep and goats have been found.<ref>Vasey, Daniel E., ''[http://books.google.com.tw/books?id=XcrrGBbT9eEC&dq= An Ecological History of Agriculture 10,000 BD to AD 10,000]'', p. 157 (2002)</ref> As of 1999, a total of 31 Yangshao sites have been located.<ref>Xiaolin Ma, "''[http://books.google.com.tw/books?ei=F6LwUtb6IsmckAWyyYD4AQ&id=ytxnAAAAMAAJ&dq= Emergent Social Complexity in the Yangshao Culture: Analyses of Settlement Patterns and Faunal Remains from Lingbao, Western Henan, China C. 4900-3000 BC]''</ref> A second neolithic site was uncovered by C.T. Wu at Longshan in Shandong in 1928. Black pottery is a characteristic find at Longshan archaeological sites. Longshan is now considered an example of the second phase of a Yangshao-Longshan culture, one that lasted from 3000 to 2000 BC. Copper was introduced around 2000 BC, and China entered the [[Bronze Age]] around 1700 BC. China's first significant state was the Erlitou culture (1900–1350 BC). This was a Bronze Age state whose capital in Henan Province was excavated in 1959.

The neolithic site of Yangshao in Henan Province was excavated by Swedish archaeologist Johan Gunnar Andersson in 1921. The Yangshao culture thrived along Yellow River and cultivated millet from about 4900 to 3000 BC. Silk was produced and pottery was fired in kilns dug into the ground. The bones of domesticated dogs, cattle, sheep and goats have been found.<ref>Vasey, Daniel E., ''[http://books.google.com.tw/books?id=XcrrGBbT9eEC&dq= An Ecological History of Agriculture 10,000 BD to AD 10,000]'', p. 157 (2002)</ref> As of 1999, a total of 31 Yangshao sites have been located.<ref>Xiaolin Ma, "''[http://books.google.com.tw/books?ei=F6LwUtb6IsmckAWyyYD4AQ&id=ytxnAAAAMAAJ&dq= Emergent Social Complexity in the Yangshao Culture: Analyses of Settlement Patterns and Faunal Remains from Lingbao, Western Henan, China C. 4900-3000 BC]''</ref> The remains of a second neolithic culture were uncovered by C.T. Wu at Longshan in Shandong in 1928. Black pottery is a characteristic find at Longshan archaeological sites. Longshan is now considered an example of the second phase of a Yangshao-Longshan culture, one that lasted from 3000 to 2000 BC. Copper was introduced around 2000 BC, and China entered the [[Bronze Age]] around 1700 BC. China's first significant state was the Erlitou culture (1900–1350 BC). This was a Bronze Age state whose capital in Henan Province was excavated in 1959.

===Historical===

===Historical===