Analysis of information sources in references of the Wikipedia article "2018年國際足協世界盃外圍賽 – 亞洲區第二圈" in Chinese language version.
Completing the tournament's qualifying contenders will be the next 16 highest ranked teams, with the remaining 12 sides battling it out in play-off matches to claim the last eight spots.
Completing the tournament's qualifying contenders will be the next 16 highest ranked teams, with the remaining 12 sides battling it out in play-off matches to claim the last eight spots.