The China State Administration for Market Regulation and Standardization Administration has published a guideline with recommended emergency response standards for transport of dangerous goods. The guideline is set to take effect from November 1, 2021. The guideline (GB/T 39652) comprises of four parts: general provisions, emergency guidelines, response distances and a list of substance which in contact with water emit toxic gases. The guideline is based on the Emergency Response Guidebook used in North America. It contains provisions on protective distances, delineation of protective zones and protective measures. See here.