Mr Danny HUNG, the Vice President of the Hong Kong Construction Association, describes 4S as a very good system that not only provides safety management, but also enhances the company's competitiveness.

Mr Danny HUNG, the Vice President of the Hong Kong Construction Association, describes 4S as a very good system that not only provides safety management, but also enhances the company's competitiveness.

Mr Danny HUNG, the Vice President of the Hong Kong Construction Association, describes 4S as a very good system that not only provides safety management, but also enhances the company's competitiveness.