However, the potential effect of Trump's policies on relationships between other countries is much less discussed. In the absence of US trade and security guarantees during Trump's first term, regional rivals China and Japan entered a detente, a period of thawing relations. With Trump's second term on the horizon, will relations between China and Japan again thaw? The Chinese-Japanese relationship is an example of "hot economics, cold politics." This term, which originated in the early 2000s to describe the distinctive relationship between these two countries, still holds today. Over the next decade, China and Japan have agreed to cooperate on an estimated $26 trillion of regional infrastructure projects. In 2021, trade between China and Japan edged above US$372 billion. Japan now serves as China's second-largest trade partner, behind only the US, with China serving as Japan's largest trading partner. Yet political animosity is a source of continuing tension. Japan's invasion of China during the Second World War, in which over 20 million Chinese people died, has left an enduring legacy. Anti-Japanese sentiment is a core characteristic of contemporary Chinese nationalism, which routinely calls for vigilance against what it considers to be an inherently militaristic Japanese culture.[/center]