Yan'an was called Yanzhou in ancient times, and the name Yan'an began from Yan'an County which was established in the third year of the Sui Dynasty (in 607 AD), and it has been more than 1400 years.( ).

Yan'an was called Yanzhou in ancient times, and the name "Yan'an" began from Yan'an County which was established in the third year of the Sui Dynasty (in 607 AD), and it has been more than 1400 years.（ ）。