China is one of many countries that have agreed to implement GHS. Chinese government has published several compulsory national standards (starting with GB) and recommended national standards (starting with GB/T) between 2006 and 2009. All of those standards have incorporated GHS criteria and entered into force in recent years. The Chinese government firstly published 26 national standards called the “Safety rules for classification, precautionary labeling and precautionary statements of chemicals (GB 20576 ~ GB 20602-2006)” in 2006. All 26 standards are directly transferred from UN GHS 1st edition (2003). 26 national standards represent 26 categories of hazards (No aspiration hazard is available.) Later the National Technical Committee on Dangerous Chemicals Management of Standardization Administration of China (SAC/TC251) released 5 more national standards based on the safety rules GB20576 to 20602. Companies selling chemicals to China and chemical companies in China are required to adopt these standards to classify, label and package chemicals as well as prepare safety data sheets in accordance with the requirements of GHS as from 1 May 2011. An appropriate emergency telephone number inside China mainland is also required in the SDS and label.