This aerial drone photo taken on Nov. 25, 2021 shows the Pingtang Grand Bridge in southwest China's Guizhou Province.

Guizhou, the only province in China without a single plain and home to deep ravines, has long relied on tunnels and bridges to overcome its jagged karst landscape.

Since 2012, the province has accelerated its bridge construction endeavors. Guizhou now has over 32,000 bridges either already built or under construction -- a tenfold increase compared to the 1980s.

Due to its sheer number of bridges, diverse bridge types and complex construction technologies, Guizhou has earned the title of "the world's bridge museum." (Xinhua/Ou Dongqu)