At the Diplomat I have some thoughts on future competition between China and the US over arms sales:
U.S. market position depends on two factors; the technological superiority of U.S. equipment, and the political value in establishing a defense relationship with the United States. Historically, China arms export strategy has been built around exploiting the edges of these U.S. advantages. First, China sells military equipment at much lower prices that the United States, which for some types of equipment (and some sellers) is ideal. Second, China will sell to just about any customer.