The used trucks in China are popular in many countries and regions around the world, especially in developing countries that are more price sensitive. Here are some main markets and reasons for popularity:

Southeast Asia: Southeast Asian countries are geographically similar to China, and there are also many cultural similarities. Therefore, China's second-hand trucks have a vast market in Southeast Asia. These countries have relatively backward roads and transportation networks, and there is a great demand for second-hand trucks with moderate prices and stable performance.

African region: Many countries in Africa have relatively backward economies and incomplete transportation infrastructure, which leads to a great demand for second-hand trucks that are affordable, durable, and able to adapt to harsh road conditions. Chinese second-hand trucks are very popular in the African market, and some countries have even become sources of import for Chinese second-hand trucks.

Latin America: The economic conditions and infrastructure of Latin American countries are similar to those of China, and China's second-hand trucks have advantages in terms of price and performance. Some countries, such as Brazil and Argentina, have a significant demand for second-hand trucks from China due to limited domestic manufacturing capabilities.

Overall, the main reasons why Chinese second-hand trucks are popular abroad include price advantages, durability and adaptability, as well as geographical and cultural proximity. These factors have made China's second-hand trucks an ideal choice for many developing countries in the logistics and transportation fields.