SANYA, China, Jan. 9, 2026 /PRNewswire/ -- The Hainan (Sanya) Marathon, held over the last weekend of 2025, marked the inaugural Class A-certified event sanctioned by the China Athletics Association (CAA) since the commencement of operations in the Hainan Free Trade Port (Hainan FTP) under its independent customs and trade regulations. Hainan FTP's advantages in easier visa access, air connectivity, duty-free trade, and international mobility were reflected in strong participation and on-the-ground activit ...