The core data of this article: the proportion of total building lifecycle carbon emissions to national energy carbon emissions, the comparison of energy consumption between assembled concrete buildings and traditional buildings, the comparison of carbon emissions between assembled and cast-in-place buildings, the target of assembled penetration rate in each province, the floor area of new assembled buildings and the proportion of new buildings

The whole process of carbon emissions from construction accounts for more than half of the total national carbon emissions

From the point of view of energy terminal carbon emissions, the building sector's carbon emissions are roughly equal to those of industry and transportation; however, if we look at the carbon emissions from the whole building process, the building sector is almost the sector with the highest carbon emissions. According to the data released by the China Building Energy Conservation Association, the total carbon emissions of the whole process of construction accounted for more than half of the total national carbon emissions, of which building materials (steel, cement, aluminum, etc.) accounted for 28.3%; the operation stage (urban residential construction, public **** building, rural buildings) accounted for 21.9%, and the construction stage accounted for 1%.

Assembled building construction method has energy-saving and environmental protection characteristics, energy saving and emission reduction in the construction and use of the stage of significant

Assembled buildings are buildings assembled from prefabricated parts and components at the site. Compared with cast-in-place buildings, assembly building construction methods in the production of building materials and construction stage carbon emissions have a certain degree of savings, on the one hand, the assembly of buildings using intensive scale digital production mode, to a certain extent, reducing the consumption of materials; on the other hand, its later use of mechanization of installation methods, greatly avoiding the emergence of construction waste, energy consumption by more than 20%, energy saving and emission reduction advantages are obvious.

The energy-saving advantages of assembled buildings are mainly reflected in the electricity consumption saved in the construction process and the energy consumption saved in the use phase. In terms of carbon emissions, according to the measurement results in the Study on Comprehensive Benefit Analysis Methods for Assembly Buildings, assembly buildings can reduce carbon emissions throughout their life cycle, with a reduction of 645.66 tons of carbon emissions in the construction phase and 2,415.9 tons of carbon emissions in the use phase.

Policies strongly support the promotion of assembly construction methods, and the scale of new assembly buildings continues to expand

Currently, policies across China are also strongly supporting the promotion of assembly construction methods. Guangdong, Anhui, Shaanxi and most other provinces have set up a penetration rate of 30% in 2035, Beijing, Shanghai, Jiangsu, Zhejiang and other economically developed regions are more stringent, respectively, set a penetration rate of 30% in 2020, 50% of the target. As the "carbon peak" "carbon neutral" policy continues to increase, digital technology to support green new construction methods will have more room for development.

With the active promotion of assembly building projects around the world, the scale of new assembly buildings in China continues to grow. By the end of 2020, the 31 provinces, autonomous regions, municipalities directly under the central government and the Xinjiang Production and Construction Corps of the country have started 630 million square meters of new assembled buildings***, an increase of 50% compared with 2019, accounting for about 20.5% of the proportion of new construction area.

-- The above data refer to the Prospect Industry Research Institute's In-depth Analysis Report on Market Outlook and Investment Planning in China's Assembly Building Industry