Tolong jelaskan mengenai Pengundian. dari Kualifikasi Kejuaraan U-23 AFC 2016

The matches were played between 23–31 March 2015 for Grups A and C (five-team groups); 27–31 March 2015 for Grups D–J (four-team groups); 16–20 May 2015 for Grup B (due to postponement).