A sound internal control system is an essential foundation for enterprise sustainability. PwC Taiwan provides consultation on the design, implementation and operation of internal control systems, focusing on the five COSO elements from the standpoint of overall risk management. By tailoring solutions to the scale and needs of the enterprise, we can help establish the appropriate internal control processes and auditing methods, enhance the internal auditor function, and achieve a perfected internal control system to deal with today's fast-changing environment.