The central flower bed of Tiananmen Square consists of a bonsai platform and a pole, which can be replaced. The construction task for this project is to remove the Olympic China logo column with an elevation of over 2.300m from the central flower bed and replace it with the Paralympic logo column and keel. Demolished section with a height of 14.3m and a weight of 19 tons (including outer skin); The height of the Paralympic emblem column is 12.353m, and the keel part is divided into seven trusses with a total weight of 12.944 tons.