Can't remember a recent year when so many K2 teams got knocked out so quickly

3rd round fixtures:

Siheung (K3) vs Hwaseong (K2)

Gangneung (K3) vs Daejeon (K1)

Jeonbuk (K1) vs Ansan (K2)

Gimpo (K2) vs Cheonan (K2)

Sejong (K4) vs Anyang (K1)

Daegu (K1) vs Gimhae (K3)

Korail (K3) vs Namyangju (K4)

Bugakong (K3) vs Suwon FC (K1)

Gwangju (K1) vs Gyeongju (K3)

Incheon (K2) vs Pyeongchang (K4)

Bucheon (K2) vs Jeju (K1)

Gimcheon (K1) vs Suwon (K2)