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The population of Cao Bang province is 528,100.
The area of Cao Bang province is 6,724.6 square kilometers.
Cao Cao's invasion of Xu Province happened in 193.
The telephone country code for Vietnam is +84. The area code for Cao Bang is 026, or +84 26 in international format.
Kefan Cao was born in July 1963, in Wuxi, Jiangsu Province, China.