Using satellite data and advanced modeling, this study inverted daily high-resolution anthropogenic CH₄ emissions across China and Shanxi Province. We found that China's 2022 CH₄ emissions were 45.1 TgCH₄·yr⁻¹, significantly lower than previous estimates, especially in coal mining and waste sectors. The inversion substantially reduced emission uncertainties and improved CH₄ concentration simulations. These results suggest China’s climate mitigation burden may have been overestimated.