China was my first thought when I read down to the Tortoise kingdom, their economy grew from sufficiency. China is a nation that doesn't create, they build upon existing innovations from the US and sell at a very cheap rate, targeting continents like Africa, and America. Products like Clothes that sells for $50 in the US actually sell for $5 in the Chinese market. Vendors buy products in China for its low prices, thereby enlarging the strength of her economy from global market domination, as the largest exporter of merchandise.
China has given importance to making product at low cost rather than spending money on research. This was very effective method for them.
European or american company spend huge amount of money on research. As a result price of their product naturally increase. Other hand, china copies these product and at the same time, their labor cost is also low. So they are able to make and supply product at a cheap cost.
In developing countries, china's products are dominate the market. Because their price is low. Even then, China is not self-sufficient. They are dependent on USA and south korea for semiconductor and chip technology. They are dependent on countries like russia and iraq for minerals and fuel oil. They are also dependent on countries like brazil and argentina for food and agricultural product. No country in the world is completely self-sufficient. It has to depend on other country. Even then, the main reason why china's economy is so strong is that they are not dependent on any specific sector.