On May 3, 2013, according to the US Court of International Trade ruling, the U.S. Department of Commerce issued an announcement to amend the anti-dumping final results of China-made hand trucks and their parts, excluded WelCom's MCK Magna Cart from taxation, and notified the United States. Customs and Border Protection Agency, WelCom's MCK Magna Cart has zero margin.

On December 9, 2003, the U.S. Department of Commerce conducted anti-dumping investigations on hand trucks and parts manufactured in China. The customs codes for the products involved were 87,186,050.10, 87,168,050,90, and 87,169,050,60. On October 14, 2004, the US Department of Commerce The anti-dumping final ruling was made and the dumping margin of the companies involved in the case in China was determined to be 24.9% to 386.75%.