This report delves into the core concepts of international economics, focusing on import tariffs and export taxes. It examines how import tariffs, particularly in the context of China, can influence the distribution of real income through the lens of protection theory, which aims to safeguard domestic industries. The report then shifts its focus to export taxes, using Australia's iron ore industry as a case study to analyze how these taxes can impact national welfare, government revenue, and the well-being of producers and consumers. It discusses the positive and negative aspects of export taxes, highlighting the complexities of balancing gains and losses within a national economy. The report concludes by summarizing the importance of both import and export taxation for economic development and the protection of domestic producers, emphasizing the need for strategic trade policies to optimize national welfare.