China criticized the European Union on Thursday over an anti-dumping investigation into wireless wide area networking (WWAN) modems, Reuters reported. The modems have a radio antenna and provide Internet Protocol data connectivity for computers. Belgium’s Option (OPTI.EBR), the sole maker of WWAN devices in Europe, filed a complaint to the European Commission, which is in charge of trade policy for the 27-nation bloc. "The case involves a huge amount of money. The Chinese public and industry are strongly dissatisfied, and the Chinese side are very concerned," the Ministry of Commerce said in a statement on its website. While the EU is China’s largest trading partner, the ministry also said it advocates resolving trade disputes through cooperation and dialogue, instead of protectionism.