The redevelopment project of Building 19, a dilapidated building, in Kaiyangli No. 3 Area, Fengtai District, Beijing undertaken by CSCEC is the first teardown-rebuild project in Fengtai to adopt CMC (steel-concrete composite modular construction) technology for low- and mid-rise structures.

Exterior view of the building before and after renovation

Built on the company's independently developed CMC technology, the project broke from conventional construction methods. By combining factory-based prefabrication with on-site assembly, it reached an overall prefabrication rate of 90 percent.

Modular components being produced at a smart factory

Compared with conventional methods, the project shortened the construction schedule by more than 50 percent, effectively reducing the time residents spent in temporary housing and the cost of rental accommodation. On-site wet work dropped substantially. Construction waste fell 70 percent, water use declined 60 percent, and construction-related noise and dust were also brought under effective control.

Bathrooms before and after renovation

After rebuilding, Building 19 has a total floor area of 2,538.05 square meters. It is expanded from the original three stories to four stories above ground and one basement level, with each household's floor area increasing by nearly 30 percent compared with that before renovation.

Living and dining room after renovation

 Independent kitchen and bathroom after renovation

The smooth delivery of the project has not only breathed new life into the old community, tangibly improving the living environment and raising the bar for housing quality, but also offered a new, replicable and adaptable solution for upgrading old residential compounds and renovating dilapidated buildings.

It helps move urban renewal beyond extensive, rough-style renovation and into a new stage of precise, quality-focused, fine-grained renewal.