Why an extra stage is required
Quyết Chiến was sixteenth in the ranking used for Yanggu, outside the top fourteen who enter the 32-player main draw directly. The UMB Events classification described by the report counts World Cup and World Championship results. The article connects his lower position with a series of limited runs over more than a year. It establishes a different starting stage, not a result in the November tournament. He must earn progress from final qualifying before joining the main competition.
Vietnam's wider contingent
The event takes place in Yanggu, South Korea, from 2 to 8 November. Bao Phương Vinh, Chiêm Hồng Thái and Trần Thanh Lực enter directly as the eleventh, twelfth and thirteenth seeds respectively. Nguyễn Chí Long and Nguyễn Trần Thanh Tự begin in the third qualifying round. Four compatriots start in the second: Phạm Quốc Thuận, Lê Thành Tiến, Nguyễn Đình Quốc and Nguyễn Hoàn Tất. Five more begin in the opening round. Including Quyết Chiến, Vietnam has fifteen representatives starting at different stages. The cited ranking positions explain eligibility at the seeding cutoff, not a live combined ranking across all billiards disciplines.