In recent years, China actively promotes the China’s supply chain, hoping the whole supply chain production process can be in China. This phenomenon influences Taiwan’s electronics industry. Taiwan's IC packaging and testing industry, the part of electronics industries, has great market share in the global. So I want to research for this industry. This study found that China’s manufacturers need to invest a fixed cost which will keep increase to access a technology. This fixed cost represents an entry barrier. After China’s manufacturers purchase Taiwan’s technology, they can additionally get a part of benefit which Taiwan’s manufacturers can’t obtain. This section also named Dupuit triangle by Romer (1994).