On Oct. 9th, 2020, State Administration for Market Regulation of the People,s Republic of China approval issued Jinan Zhongbiao Technology Co., Ltd. and Shandong Zhongbiao Qixin Testing Technology Co., Ltd. developed some kinds of CRMs, including the certified reference materials of pig iron, cast iron for spectral analysis and blast furnace slag, electric furnace slag, converter slag and fluorine, chlorine, arsenic, mercury, phosphorus in coal, the gradation certificate of the national certified reference material was‘No. 2325, No. 2326, No. 2327, No. 2328 and No. 2358’.