Hello! Here, industrial raw materials or semi-finished products and primary products are mainly exported, and the prices are generally low; Mainly imported manufactured goods. Reason: 1, rich in natural resources, including iron, manganese, copper, coal, bauxite, graphite, etc. Madagascar is rich in graphite. The Atlantic coast produces oil. This land is regarded as a fertile continent. South Africa: Gold production ranks first in the world. Guinea: Bauxite production ranks first in the world. Zambia: an important copper producer in the world. Congo (DRC): Diamond production ranks first in the world. Nigeria: Africa's largest oil producer. 2. Sub-Saharan African countries (except South Africa) have poor scientific and technological conditions and backward industrial industries, so they can only earn foreign exchange by exporting primary agricultural and mining products and importing finished products. There are many ports in this area with convenient transportation. This place has always been the traditional market of western powers (especially for a long time in history, this place was a western colony).