I don't know about the G6 having issues with this - most G6 countries, with the possible exception of the US, will probably applaud at least the reduction in carbon emissions entailed by replacing even planned coal fired power with less CO2-heavy options.
Now, natural gas is still nowhere near perfect, but reducing China's dependency on coal is hugely important and necessary globally - and not just from the perspective of emissions, but politically; too often we hear the self-serving argument "why should we do anything here about CO2? Look at China - they pollute way more than we do!"