Why do most of the roads built by China Company in Africa use asphalt pavement?

Most roads built by China Company in Africa are paved with asphalt to make them smooth and corrosion-resistant. Because the overall smoothness of asphalt pavement is better than that of concrete pavement, and asphalt pavement has no transverse joints and longitudinal joints, it is more comfortable to drive than concrete and is not easy to bump. Asphalt concrete pavement is durable and corrosion-resistant, especially resistant to carbonic acid vapor in the environment. Therefore, the roads built by China Company in Africa are mostly asphalt pavements.