龍成檢測始于2012年7月，总部位于黄渤海之滨烟台市，是经市场监管局核准具有独立法人资格第三方实验室。实验室质量管理体系严格依照ISO/IEC17025:2017及JJF1069-2012体系要求建立，通过中国合格评定国家认可委员会实验室认可(注册号CNAS L12930)，取得行政审批局区域计量授权(烟开法计[2020]001号)，在中国(山东)自由贸易试验区烟台片区内承担计量检定任务，又经市场监管局批准([2025]鲁市监许函字第0003号)，实验室获得检验检测机构资质认定(CMA)，可依法在全国范围内向社会提供计量及检测服务，所出具证书国际认可及具法律效力。目前公司有一级注册计量师8位，二级注册计量师12位。 

龍成檢測的使命是“精准测量-助力客户提质增效”，让广大客户都能享受便捷可靠的计量及检测服务。作为山东最早从事计量检测服务、首家具备三项资质(实验室认可、计量授权及资质认定)的第三方计量检测机构，自成立以来始终以客户需求为中心，本着信誉至上、服务优良、服务社会的宗旨，践行“客户为先、员工为本、质量为重”行为准则，坚守“提供超值服务，超越客户期待”服务承诺，不断壮大，向广大客户提供一站式计量检测数字化解决方案，已向全国包括世界五百强在内上万家客户提供服务并建立长期合作关系，赢得越来越多客户宝贵信赖！ 

Longcheng Testing, established in July 2012 and headquartered in Yantai City on the coast of the Yellow and Bohai Seas, is a third-party laboratory accredited by the Market Regulation Bureau as an independent legal entity. The laboratory operates under a stringent quality management system compliant with ISO/IEC 17025:2017 and JJF 1069-2012 standards. It holds the following certifications and authorizations:CNAS Accreditation (Registration No.: CNAS L12930) from the China National Accreditation Service for Conformity Assessment (CNAS).Regional metrological authorization from the Administrative Approval Bureau (Authorization No.: Yankaifa [2020] No. 001), enabling it to undertake statutory metrological verification tasks within the Yantai Area of the China (Shandong) Pilot Free Trade Zone.CMA Certification (China Metrology Accreditation), approved by the Market Regulation Bureau([2025] Lu Market Regulation Approval Letter No. 0003), permitting nationwide legally valid and internationally recognized calibration and testing services.

Longcheng Testing Mission: "Precise Measurement – Empowering Clients to Enhance Quality and Efficiency."As Shandong’s earliest third-party metrology and testing service provider and the first to achieve the "triple accreditation" (CNAS, statutory metrology authorization, and CMA), Longcheng Testing prioritizes client needs, adhering to the principles of "reputation first, service excellence, and societal contribution." Guided by its core values of "clients first, employees as the foundation, and quality as the priority," the company commits to delivering "value-added services that exceed client expectations."Offering one-stop digital metrology and testing solutions, Longcheng Testing has served over 10,000 clients nationwide, including Fortune Global 500 enterprises, building long-term partnerships and earning widespread trust through reliable, convenient, and legally authoritative services.