GUIYANG, July 1 (Xinhua) -- Southwest China's Guizhou Province will invest more than 500 billion yuan (75.6 billion U.S. dollars) in constructing expressways in the next five years.

The province has vowed to make its total length of expressways reach 10,000 kilometers by 2022, according to a Guizhou action plan for expressway construction, released by the provincial department of transportation.

The new expressways will cover all scenic spots, main cities, train stations, and airports in the province, and connect Guizhou with neighboring city clusters and economic hubs.

Transportation in the mountainous province was previously backward due to its rugged terrain. Guizhou has made efforts to improve its transportation system in recent years. All counties in the province were connected by expressway as of 2015, and asphalt roads had been built for all villages by 2017.