文章首先分析了3G以及中国联通3G业务的发展情况,然后借鉴中国联通的3G业务的波特五力分析模型,认为中国联通在同业竞争中并不具有明显的优势,但是业内的3G竞争十分激烈。文章的实证部分,对3G项目数据进行了估算,包括:初始投资、营业收入、营业成本和现金估计流;紧接 First of all, the article analyzes the development of 3G and China Unicom’s 3G business, and then draws on the Porter Five Forces analysis model of China Unicom’s 3G business that China Unicom does not have obvious advantages in the industry competition, but the industry’s 3G competition is very intense . The empirical part of the article estimates 3G project data, including: initial investment, operating income, operating costs and cash flow estimates;