FILE - A worker rests between billboards that read: ''Construction of the Serbian-Hungarian railway'' in Belgrade, Serbia, Friday, Sept. 4, 2020. In 2014, Hungary and Serbia concluded an agreement with Beijing to modernize the railway between their capitals of Budapest and Belgrade, part of a Belt and Road plan to link up with the Chinese-controlled port of Piraeus in Greece, to the south, an entry point for Chinese goods to Central and Eastern Europe. (AP Photo/Darko Vojinovic, File)