A temple atop Junshan Mountain in Nantong [Photo/WeChat account: gotonantong]

Junshan Mountain, which stands beside Langshan Mountain, is the largest and the highest of the five mountains.

According to local folklore, the mountain used to be an island during the Qin Dynasty (221-206 BC). It got its name "Jun", which means "military" in Chinese, as Emperor Qin Shihuang stationed troops on it.

Junshan Mountain also boasts a number of historical sites, including China's first privately-built observatory and a Buddhist temple dating back to the Ming Dynasty (1368-1644).

The temple houses the world's largest seated jadeite statue of Guanyin, the Goddess of Mercy.

Junshan Mountain's other notable attractions include a 45-meter man-made waterfall and a tea garden.