Jinmao Tower and World Financial Center use the number 70.

Does the subject want to ask: Why do Jinmao Tower and World Financial Center use the number 88? The number "8" has special significance in Jinmao Tower and World Financial Center. China people have a soft spot for this auspicious number, because "8" symbolizes wealth and prosperity. Therefore, the structural engineers of SOM added many "8" s to the architectural design. Structurally, the building adopts the structure of eight giant columns connected with the core tube, and the octagon based on the overlapping of two squares is the main plane of the building. At the same time, the total number of floors in the building has reached 88.