In early December 2022, Vietnam began dredging and filling activities at the Tốc Tan A island site.[4] By November 2023, Tốc Tan A had become an artificial island with an area of approximately 2 hectares, a length of about 150 meters, and a width of about 140 meters. Vietnam began filling and dredging at the Tốc Tan C island site in September 2024, and at the Tốc Tan B island site in December 2024. The three islands together total 6 hectares.