Beijing, March 20 (Youth.cn) - On the morning of March 18, 2026, the 81666 railway customized freight train, fully loaded with deeply processed resin products from Sinopec, departed slowly from the Haikou Railway Port Station, heading north towards Guangzhou International Port. This marks the successful launch of the first railway customized freight train service after the full-island customs closure operation of the Hainan Free Trade Port. Photo/CFP