What is Donald Trump's proposal for global defense spending and how has China responded to his suggestion?

Donald Trump has proposed that major defense spending nations, including the U.S., China, and Russia, should significantly reduce their military budgets by half. He argues that these funds could be better allocated to domestic welfare needs and other government priorities rather than defense spending. China has responded by challenging Trump to "walk the talk," pointing out that the United States should first reduce its own defense budget before asking other nations to do so. China specifically highlighted that the U.S. spends more on defense than several other nations combined and maintains over 800 military bases worldwide, making Trump's suggestion somewhat contradictory given America's own massive military expenditure of approximately $850 billion for fiscal year 2025.