March 23，Experts from the National Center for Safety Signs of Mining Products came to the group company to conduct on-site evaluation of safety signs of mining products.。

Review basis《Factory Quality Assurance Capability Requirements》And the special requirements for factory review of the corresponding products.，Mainly from production、Technology、Quality inspection、Review of technical data in four aspects of procurement。

On-site verification and data review by evaluation experts，It is considered that the quality management system of the product is sound and operates normally.，Production equipment、The inspection instrument is complete and meets the production requirements，Technical force to meet production needs，Skilled operation of inspection personnel，Have the ability to produce concrete pump products for coal mine，Successfully passed the audit。