System certification refers to activities where an independent third-party organization conducts audits and assessments on an organization's management system against specific international or national standards covering quality management, environmental management, information security and other fields, and issues certification certificates accordingly. It aims to verify that the organization has standardized and effective management capabilities in relevant fields, build market trust, as well as help the organization improve management performance and mitigate risks. Common system certifications include ISO 9001 (Quality Management) and ISO 14001 (Environmental Management).

Service certification refers to activities where an independent third-party organization evaluates the service quality, management proficiency and service capacity of service providers in accordance with relevant standards and rules, and issues corresponding certifications. It aims to standardize the service industry, improve service quality and boost consumer confidence. Core evaluation elements include service specifications (procedures and criteria), service capacity (staff competence and facility completeness), service quality (customer satisfaction and process traceability), and management systems (sound internal mechanisms). It covers a wide range of sectors: public services including education, medical care and government services; commercial services such as catering, accommodation and logistics; and professional services like finance and information technology. The certification process consists of application & acceptance, audit preparation, on-site assessment, result review, as well as supervision and re-evaluation. For enterprises, it helps enhance competitiveness, build brand image and optimize management. For consumers, it offers credible references and protects legitimate rights and interests. For the industry, it fosters healthy competition and standardization. Acting as a "health check certificate" for service quality and a "passport" for consumer trust, service certification fuels the high-quality development of the service sector.

Product certification refers to activities where an independent third party tests and evaluates products in terms of quality, safety, performance, environmental performance and other characteristics in accordance with applicable standards, laws, regulations and technical specifications. Certificates and marks are issued to prove product compliance. Its core objectives are to guarantee product quality and safety, protect consumer rights and interests, and facilitate product trading and circulation. It falls into various categories. By nature, it includes mandatory certification such as China CCC Certification for home appliances, automobiles and other products, and voluntary certification such as energy-saving product certification and organic product certification. By content, it covers safety certification to ensure product use safety, performance certification to verify functional indicators, and environmental certification to assess environmental impacts. The standard certification process consists of application acceptance, sample testing, factory inspection, result evaluation, certificate issuance and follow-up surveillance. For enterprises, product certification acts as a gateway to the market, helping improve product competitiveness and brand reputation. For consumers, it serves as a reliable reference for purchasing and reduces potential risks. For the market, it regulates competition and drives technological progress across the industry. Product certification is an important measure to ensure product quality and boost trade.

Metrological calibration means comparing measuring instruments and equipment with standard devices of known accuracy using professional equipment and methods under specified conditions, so as to determine parameters such as indication error and correction value. It ensures the accuracy and compliance of measuring instruments, provides technical support for unified measurement values and valid data in production, scientific research, testing and other fields, and serves as a fundamental guarantee for reliable measurement results.

Hazardous substance testing adopts scientific methods to identify and analyze substances that pose risks to human health, environmental safety and product quality for risk control. It mainly covers three categories of test objects: chemical substances including heavy metals such as lead and cadmium, volatile organic compounds (VOCs) like formaldehyde and benzene, as well as pesticide residues and asbestos; biological substances such as bacteria, molds and biological toxins; physical substances including radioactive materials and PM2.5. Relevant standards are strictly followed in testing. The EU RoHS Directive restricts six substances in electrical and electronic products, and the REACH Regulation regulates substances of very high concern. National GB standards of China apply to food, textiles and other fields. The US EPA and CPSC standards govern environmental protection and consumer products respectively. Common testing methods include spectrometry for heavy metal detection, chromatography and hyphenated techniques for organic compound analysis, biological assays for microorganisms and residues, and physical testing for rapid screening. Widely applied in consumer goods (electrical products, textiles, toys, etc.), food and pharmaceuticals, environmental monitoring and industrial production, this testing plays a vital role in ensuring regulatory compliance, safeguarding public health and protecting the environment, and serves as a core approach for risk management.

Electrical and electronic product testing is a systematic assessment conducted in accordance with relevant standards to verify the safety, performance, environmental friendliness and reliability of electronic and electrical products throughout design, production and distribution stages, ensuring product compliance, user safety and environmental protection. It is mainly divided into four categories. Safety testing covers electrical safety such as insulation and overheating protection, as well as electromagnetic compatibility (EMC), to prevent electric shock, fire hazards and electromagnetic interference. Environmental and hazardous substance testing complies with the EU RoHS Directive restricting six hazardous substances and relevant Chinese regulations, and also targets plasticizers and other contaminants. Performance and reliability testing evaluates functional indicators such as household appliance efficiency and conducts reliability tests under simulated extreme environments. Energy efficiency testing assesses energy consumption performance to meet standards including the EU ERP. Major applicable standards include international IEC and ISO standards, regional and national regulations such as EU CE and RoHS, US FCC and UL, as well as China CCC and GB series standards. The general testing procedure includes sample preparation, item confirmation, laboratory testing, report issuance and certification application. As an essential market access credential, this testing protects end users, enhances brand reputation and promotes environmental protection. It is a critical link for securing industrial chain safety and facilitating international trade.

Material analysis and testing applies multidisciplinary theories and technologies to systematically examine and analyze the composition, structure, properties and defects of materials. It aims to reveal the inherent characteristics of materials and provide scientific support for research and development as well as production. Main testing items are as follows. Composition analysis identifies the types and content of elements and compounds via spectrometry, chromatography and other methods. Structural analysis explores macro and micro structures with the help of XRD, electron microscopes and other equipment. Property testing evaluates mechanical, physical, chemical and functional performances. Defect detection identifies internal and surface defects by means of non-destructive testing such as ultrasonic and radiographic inspection. Common testing methods include spectrometry (AAS, ICP-OES for metallic element analysis), microscopy (SEM for surface morphology observation), mechanical testing (tensile test, hardness test), thermal analysis (TGA, DSC for thermal stability evaluation) and non-destructive testing (ultrasonic testing for internal crack detection). It has a wide range of applications. In industrial manufacturing, it is used for raw material screening. It provides data support for the research and development of new materials, detects pollutants for environmental protection, and assesses the safety of medical materials in the biomedicine sector. It plays a vital role in ensuring product quality, driving technological innovation, solving practical problems and standardizing the industry. Serving as a bridge between material research and practical application, it is of great significance for enhancing overall competitiveness.