Photos taken on Friday show an elderly couple sightseeing pushing each other's wheelchair along the river in Harbin, northern China's Heilongjiang Province. (Photos: IC)

Photos taken on Friday show an elderly couple sightseeing pushing each other's wheelchair along the river in Harbin, northern China's Heilongjiang Province. (Photos: IC)

Photos taken on Friday show an elderly couple sightseeing pushing each other's wheelchair along the river in Harbin, northern China's Heilongjiang Province. (Photos: IC)

Photos taken on Friday show an elderly couple sightseeing pushing each other's wheelchair along the river in Harbin, northern China's Heilongjiang Province. (Photos: IC)