Analysis
Donald Trump did post a tweet on November 2, 2012 with that exact wording, but the underlying assertion is unsupported by scientific evidence. Climate change is a well‑documented, globally observed phenomenon driven largely by human emissions of greenhouse gases, not a Chinese invention. Multiple scientific bodies, including the IPCC, have debunked the idea that global warming is a hoax or a geopolitical tool.
Background
The scientific consensus on climate change has been established over decades of research, with over 97% of climate scientists agreeing that warming is real and primarily anthropogenic. The notion that the concept was fabricated by China has been promoted in political rhetoric but lacks any credible evidence. Trump's tweet reflects a political narrative rather than factual reality.
Verdict summary
The claim that global warming was created by the Chinese to hurt U.S. manufacturing is false.