Chapter 4 explains the anti-dumping investigation procedures of the US and EU and their differences. China represents a special case for other members with its socialist market economy and growing impact in the global political arena. Within the scope of this research, China needs to be evaluated in detail as (1) nearly one-quarter of all anti-dumping measures were taken against China, (2) Chinese exporters complain about the anti-dumping investigations both at the domestic level and the WTO DSM, (3) the attitude towards Chinese exporters eventually turns into general policies applicable to the other WTO members as the ADA is silent on some procedural issues. Thus, Chapter 4 describes the anti-dumping procedures of the US and EU and the position of China. These different procedural rules form a connection with the notion of hidden trade protectionism and anti-dumping.