This document discusses recent developments in open environmental information in China. It outlines the legal framework for disclosure, including key laws and measures passed since 2007. It also describes requirements for government agencies and companies to disclose various types of environmental information. The document then reviews progress made, such as the release of air quality data in 74 cities, and discusses observations from a civil society organization's Pollution Information Transparency Index reports, which have found improving disclosure scores but room for further progress.