UNFCCC Paris Conference (COP21) reached important outcome including the Paris Agreement, which clarifies a package of global long-term goals to address climate change. The inclusion of aiming for 1.5℃ temperature control indicated enhanced political willingness for climate risk control, and the Paris Agreement also primarily depicted the global emission trajectory. In the future, scientific assessment and political negotiation could further clarify quantitatively emission space, emission trajectory and reduction requirements at global and regional level, or even for major emitting countries as well. Such a trend could integrate detailed top-down elements into the new global climate regime, which was gradually developed mainly via a bottom-up approach featuring the INDC process. This trend would have huge implications for developing countries and particularly for major developing emitters, for their emission allowances and emission space, and might influence the characteristics of national determination of countries' climate contributions.