On December 31, 2012, the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Management Committee of the People's Republic of China issued the National Standard Notice No. 47 of 2012, which approved the release of seven national standard samples such as "Standard Samples for Coal Ash Component Analysis, Standard Samples for Coal Ash Fusibility and Form Sulfur in Coal" developed by Jinan Zhongbiao Science and Technology Co., Ltd.