(250516) -- WASHINGTON, May 16, 2025 (Xinhua) -- The ancient Zidanku Silk Manuscripts from the Warring States period are displayed during a handover ceremony at the Chinese Embassy in the United States in Washington, D.C., on May 16, 2025. The Smithsonian's National Museum of Asian Art on Friday officially returned the Zidanku Silk Manuscript volumes II and III: Wuxing Ling and Gongshou Zhan from the Warring States period to China's National Cultural Heritage Administration. (Xinhua/Hu Yousong)