Sales during the week ending March 20 were virtually zero, at 54 tons, according to data from the U.S. Department of Agriculture. Sales had already been low the previous week, at 192 tons, with uncertainty over export registrations slowing activity. The expiration of registrations is compounded by additional tariffs imposed by China on U.S. beef and other products, making the products less attractive to Chinese buyers. China has not renewed export registrations for U.S. beef facilities that expired on March 16, although it did update registrations for pork and poultry plants. As a result, U.S. exporters and Chinese buyers are reluctant to close ...