Six coal mines in Yanjin County resumed operation. According to the relevant information of Yanjin County People's Government, six coal mines, including Huajiagou, Heba, Yongfeng, Dadui, Jinjiawan and Taozi, obtained the "commencement order" to strengthen the service of "one-on-one assistance, one enterprise and one scheme" and "nanny", and these six coal mines were retained for technical transformation and upgrading.