n April 20, 2018, the staff of Changrong Machinery Co , Ltd in Changyi were trained on fire safety knowledge by Mr Zhu, a fireproof teacher of Weifang She an
On September 30, 2018, two teachers from Beijing Zhongrunxing Certification Co , Ltd reviewed the operation of the quality system of Shandong Changning Group Co , Ltd and passed it smoothly
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