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The project started in 2000, with 2 floors underground and 24 floors above ground, with a total construction area of about 52,000 square meters.It is the first high-rise building in China that adopts rectangular steel pipe concrete column structure technology designed, produced and installed by itself, which fills the blank in China, and is a "revolution" for China's construction industry, and is regarded as "the first steel structure building in China" by the industry.In addition to the good seismic performance of the steel structure system, the adoption of the new technology also solves the problem of poor fireproof performance of the traditional steel structure, which is listed in the national key technological innovation demonstration projects.Subsequently, on the basis of the success of this project, Hangxiao Steel Structure and Tongji University jointly edited the Technical Regulations for Rectangular Steel Pipe Concrete Structures, which made an important contribution to the development of China's high-rise steel structure, and now 80% of high-rise buildings have adopted this technology.