Resource complementarity: Brazil has rich natural resources such as oil, mineral products, and agricultural products, while China needs to import a large amount of these resources. Through trade exchanges, the two countries can complement each other's advantages and achieve effective resource allocation.

Industrial complementarity: China's manufacturing industry is well-developed and skilled in producing various commodities, while Brazil's service and manufacturing industries are also growing. In the industrial chain, the two countries can form complementary advantages and improve overall efficiency.
Market complementarity: China and Brazil are both populous countries with vast market prospects. There are some differences in consumer demand between Brazil and China, and through trade exchanges, the two countries can satisfy each other's market needs.
Technological complementarity: China has advanced technology and experience in high-speed rail, high-speed railways, and infrastructure, while Brazil is relatively backward in these fields. Through technological exchanges and cooperation, the two countries can achieve technological complementarity and improve overall technological level.
Financial complementarity: There is also a complementary relationship between China's and Brazil's financial systems. China has a relatively sound financial market and financial institutions, while Brazil needs to strengthen its development in the financial field. Through financial cooperation, the two countries can promote the development and improvement of each other's financial markets.
Overall, there is strong trade complementarity between China and Brazil, which is derived from the differences and advantages in resources, industries, markets, technology, and finance. By strengthening trade cooperation, the two countries can further deepen economic ties and achieve common development.