BEIJING, May 9 -- China's advertising market has grown into the world's second largest after years of rapid expansion, an official said on Friday.

The annual revenue of Chinese advertising enterprises topped 500 billion yuan (80.6 billion U.S. dollars) in 2013, said Zhang Mao, head of the State Administration for Industry and Commerce.

China has 450,000 advertising businesses with more than two million people in the sector, said Zhang at the opening ceremony of the 43rd International Advertising Association World Congress here.

Chinese State Councilor Wang Yong said at the ceremony that advertising is one of the major industries in the tertiary sector and its fast development made great contributions to the country's economic and social progress.