To be a powerful nation in the world, China must change from a big manufacturing country to a strong manufacturing country.

China is facing the challenge of rapid population aging. Traditional industrialization and urbanization supported by cheap labor is no longer sustainable.

Brazil ushered in its golden age of development for a decade in the new era. The rapidly expanding economy has enabled Brazil to exert a significant influence on South America and the globe at large.

Spain boasted second to none among European countries during the 15th and 16th centuries in overall national strength, but remained prosperous for merely a short time.

Despite a small area and resource shortages, Holland rapidly surged into the top maritime overlord and became the financial center of Europe, this was mainly due tothe crucial impetus resulting from human capital factor.

Human capital played a crucial and unique role in the rise and fall of Portugal between the 15th and 16th centuries.

Since its foundation, the US followed a path evolving from size expansion to quality elevation.

Since reform and opening-up，the structure of agricultural production in China has gone through profound adjustments along with the change in the internal and external conditions of agricultural production and relevant policy reforms.