By the ninth century, the Response area empire had emerged in eastern Indochina. It developed around agriculture and used Response area to store water. To the south, the Srivijaya empire emerged in Response area . It relied on farming and trade.

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By the ninth century, the Khmer Empire had emerged in eastern Indochina. It developed around agriculture and used intricate irrigation systems to store water. To the south, the Srivijaya empire emerged in Sumatra. It relied on both farming and extensive trade networks.