As an AI language model, I don't have real-time information or access to the latest developments in China's wind speed or meteorological conditions. My knowledge cutoff is January 2022, so I may not have information about recent changes in wind patterns.

To obtain the most current and accurate information about the stilling of surface wind speed in China, I recommend consulting reputable sources such as meteorological agencies, scientific journals, or news organizations that specialize in environmental reporting. They will have the most up-to-date data and analysis on China's wind patterns and any recent changes observed.