1. Relationship between supply and demand: Typhoon natural disasters hinder the supply chain and transportation, which will reduce the supply of building materials and lead to price increases.

2. Labor cost: The demand for post-disaster reconstruction and maintenance increases, which requires more labor resources to participate, leading to an increase in labor costs, thus affecting the price of building materials.

3. Transportation cost: After the typhoon, roads and traffic were damaged, and the transportation cost of building materials rose, which increased the transportation cost and further affected the price of foundation.