Originally designed to be angular twin towers to rise as high as , the final design has changed substantially to a rounder, more curve-based design featuring the concept of Seoul Wave, which represents Seoul's status as a city of history, globalization, culture and environment. It also transforms the historic meaning and image of the Smoke-Signal Station on Namsan mountain, or a beacon mound on the mountain as a traditional measure of communications, to a flow of light, which symbolizes a modern measure of communications, or the digital industry. The building's façade resembling a lighthouse is aimed at expressing a vision as a light leading the new millennium.