トゥアティエン＝フエ省
In 1306 Jaya Sinhavarman III offered to cede the two Cham provinces of Chau O and Chau Ly as a dowry and Trần Anh Tông finally agreed to give his sister in marriage to the Cham king. In 1306 Trần Anh Tông married off princess Huyền Trân to the Champa King Jaya Sinhavarman III (Vietnamese: "Chế Mân", 制旻) and as Queen Paramecvariin of Champa, in return for the two provinces of Chau O and Chau Ly (or Chau Ri) (today these provinces are Quảng Bình Province, Quảng Trị Province and Thừa Thiên–Huế Province).