A 400-year-old stone bridge has reappeared in China's largest freshwater lake, Poyang in east China's Jiangxi Province, after the water level dropped recently. /VCG

Constructed in the Ming Dynasty (1368-1644), the 2,657-meter-long bridge is China's longest stone bridge and is made of granite. /VCG

The name of the bridge is "Qianyan," which literally means "one thousand holes," because it has nearly 1,000 openings along its length to facilitate flood discharge. /VCG

Normally lying at the bottom of the lake, the bridge is only revealed when the water level of Poyang Lake is below 10.5 meters. /VCG