Shanghai, China - Recent (CCTV - No access Chinese mainland)
1. Fast-motion of Shikumen buildings being moved
2. Various of small crawler-type transporting robots moving Shikumen buildings, workers overseeing movement

Century-old buildings in Shanghai, temporarily relocated in-whole to accommodate underground construction, have been laid back on their original site in an impressive feat of engineering involving over 400 carrying robots stepping in sync.

The buildings, weighing 7,500 tonnes and covering an area of 4,030 square meters, were originally built in the 1920s and 1930s in the Shikumen architectual style -- a distinctive fusion of Western elements with those of traditional Jiangnan-style residences from the southern region of the Yangtze River Delta.

For decades, they have stood in the city's Zhangyuan cultural and historical block as the best preserved and most diverse Shikumen building complex in Shanghai.

Efforts to move the building complex back into place began on May 19, with a total of 432 small crawler-type transporting robots moving the complex as a whole at an average speed of 10 meters per day.

To accommodate the construction of a ground-level roof for a 53,000-square-meter underground complex, the buildings at Zhangyuan had originally been moved away in whole due to their large number and density, which left no space for renovation and repairs.