This document analyzes the residential development business in China using Michael Porter's Five Forces model. It examines the intensity of industry rivalry (neutral to favorable), threat of new entrants (neutral to unfavorable), threat of substitutes (favorable for end use, neutral for investment), bargaining power of suppliers (favorable), and bargaining power of buyers (neutral). Key factors discussed include barriers to entry, differentiation of developers' products, availability of substitutes, developers' relationships with suppliers and power in negotiations, and how buyers' power fluctuates depending on the property cycle stage.