On July 5th, 2024, State Administration for Market Regulation of the People,s Republic of China approval issued Jinan Zhongbiao Technology Co., Ltd. developed some kinds of CRMs, including the certified reference materials of carbon steel , alloy steel, stainless steel for spectral analysis, and magnetic iron ores, hemaite iron ores, sinter iron ores, pellet iron ores, electric furnace slag for chemical analysis, the gradation certificate of the national certified reference material was‘No. 5620, No. 5621, No. 5622, No. 5623, No. 5624, No. 5625, No. 5626, No. 5627and No.5634’.