On April 28th, 2026, State Administration for Market Regulation of the People,s Republic of China approval issued Shandong Zhongbiao Qixin Technology Co., Ltd. developed some kinds of secondary CRMs, including the certified reference materials of pig iron & cast iron for spectral analysis, alloy steel for spectral analysis, copper alloy for spectral analysis, pure copper for spectral analysis,the gradation certificate of the national certified reference material was‘No. 7899, No. 7900, No. 7901, No. 7902’.
