Technical development, production and sales of traffic safety facilities and traffic protection equipment; Construction and maintenance; Traffic facility installation and maintenance; Domestic trade, goods and technology import and export (excluding items requiring approval before registration as stipulated by laws, administrative regulations, and State Council decisions); Undertaking design, installation, and emergency repair projects for signal lights, guardrails, markings, signs, anti-glare boards and other traffic safety facilities on various grades of highways and urban roads (excluding restricted items above); Traffic signal and ramp control systems, electronic police systems, variable information systems, vehicle detection and guidance systems, road and bridge and parking lot charging systems, economic information consulting, information consulting; Technical services for traffic facilities. Hardware product retail; Hardware product wholesale; Building materials sales; Wire and cable operation; Special labor protection product sales; Building metal accessory sales; Metal tool sales; Electrical accessory sales; Power facility equipment sales; Traffic facility repair; Traffic and public management sign sales; Fire equipment sales; Safety and fire metal product manufacturing; Plastic product manufacturing; Clothing retail; Clothing wholesale; Labor protection supplies wholesale; Labor protection product sales; Domestic trade agency; Cement product sales; Electronic components and electromechanical component equipment sales; Rubber product sales; Rubber product manufacturing; Household appliance sales; Electrical equipment manufacturing; Daily mask (non-medical) sales; Landscape engineering construction. Building metal accessory manufacturing; Metal structure manufacturing; Traffic and public management metal sign manufacturing. Production of traffic safety facilities and traffic protection equipment. Type II value-added telecommunications services