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In April 2018, it passed the ISO / 14001:2015 quality and environment system certification audit (Certificate No.: 01 104 126834). In June 2018, it passed the ISO / 9001:2015 quality and environment system certification audit (Certificate No.: 01 100126834). In June 2018, it passed IATF / 16949:2016 quality and environment system certification audit (Certificate No.: 01 111 126834 / 01, 01 111 126834 / 02).

In September 2015, it passed the ISO / TS 16949:2009 quality system certification audit (Certificate No.: 01 111 126834 / 01; 01 111 126834 / 02 TMS).

On January 5, 2015, quality and environmental management system of Dandong Dadong coil Engineering Co., Ltd. (ISO 9001:2008 & ISO14001:2004 + cor.1:2009)The second follow-up audit ended at 15 p.m.