What authoritative certifications has the Silver Porcelain by Tiancheng craft obtained?

The company has obtained multiple authoritative certifications:

• Fine Gold and Fine Silver Content Testing Certification from the National Gold and Silver Products Quality Supervision and Inspection Center (Changchun).
• Heavy Metal Silver Migration Qualification Certification in Water from the Chinese Academy of Sciences (CAS) and CAS Xiangshi testing.
• PICC Property and Casualty Insurance Quality Guarantee.
• SGS Testing Qualification Certification.
• EU REACH (249 items) Testing Qualification Certification.
• ROHS Testing Qualification Certification.
• Hengyi Antibacterial Comparison Testing Certification.
• “Lead and Cadmium Dissolution Qualification Certification” for harmful elements issued by the National Ceramic Product Quality Supervision and Inspection Center.
• Q/YCTC-001 Quality Inspection Qualification Certification.