The “Sino-US Workshop on NOx Emissions Control” was held in Kunming, China, on September 25-26, 2012. The purpose of the workshop was to enhance the exchange of ideas between China and the US, and to improve the total emissions control system for NOx in China. Approximately 80 participants from the US and China attended the workshop. This document contains a summary of the 18 presentations made at this workshop, and highlights the main points of emphasis