Every summer, the rising Yangtze River submerges a hundred-meter stretch of concrete wall in Hankou Riverside Park, covering thousands of metal locks and inscribed vows beneath muddy floodwaters. This structure is the Hankou Love Wall, a three-meter-high flood barrier that doubles as a repository of human hope.

The wall was created in 2013 as part of the annual May Day Low-carbon Wedding Ceremony, jointly organized by the Changjiang Daily and the Hankou Riverside Park management office. Park officials selected a 100-meter section of the concrete slope protection wall near the "Flowing Water" (Shishui) sculpture to serve as the site. Engineers modified the barrier to support iron chains and railings without compromising its flood-prevention capabilities. They decorated the flanks with two red-painted metal plates featuring traditional paper-cut figures of a husband and wife bowing to each other.

Since its inauguration on April 28, 2013, the wall has hosted the city's annual collective marriage ceremonies. During the May Day Low-carbon Wedding, grooms ride tandem bicycles to the riverbank to pick up their brides. They attach heart-shaped, square, and even heavy bicycle locks onto the iron chains and throw away the keys to symbolize permanent union. Some couples have their names and vows laser-engraved onto gold plaques fixed directly to the stone.

This romantic ritual is constantly intertwined with the rhythms of the river. During the severe floods of July 2020, the Yangtze River rose to 28.7 meters, completely submerging the lock corridor. When the water receded, the locks re-emerged, coated in river silt and orange rust. The metal weathered, but the physical bonds remained intact, held fast by the very wall that protects the city from the current.