An aerial photo shows a high-speed train travelling through the countryside in Kaili, Guizhou province, on June 22, 2016. [Photo/Xinhua]

BEIJING -?China on Thursday issued a white paper on the country's transport network, reviewing the sector's tremendous changes in past decades and setting goals for its further expansion in coming years.

The white paper, titled "Development of China's Transport," said the sector should quicken its pace of development, and fully play its basic role as a vanguard for completing the building of a moderately prosperous society in all respects in 2020.

By 2020, China will have 30,000 km of high-speed railways, covering 80 percent of big cities, and 30,000 km of newly renovated expressways.

The white paper was issued by the State Council Information Office.