


Building decoration engineering professional contracting level one

General contracting of construction engineering / fire protection class II / intelligence class II / mechanical and electrical engineering class III

Safety production license

Business License of Conran Construction Group

Class I qualification certificate for clean engineering

Design, construction and maintenance qualification certificate

Quality Management System (ISO 9001) Certification (Engineering Construction)

Environmental Management System (ISO 14001) Certification

Occupational health and safety management system (OHSAS18001) certification

Quality Management System (ISO 9001) Certification

Double-layer square steel pass sound insulation structure patent

Patent for basement and its moisture-proof ventilation system

The installation structure patent of base skeleton damping and sound insulation

Patent for wall structure of compound building to prevent sound wave of solid noise
