International aid is not only a creation of diplomatic activities between countries in the 20th century, but also a method to enhance a country’s international influence. Along with the increase of Chinese companies’ overseas investment, a Chinese model of international aid, which unites investment, aid and trade as a whole, has appeared. There are obvious theoretical and practical differences between this model and traditional western ones. With a case study on Sicomines project in Congo(DRC), this paper analyses the international debates about China’s mixed aid model and the improvements made by China in international aid.