I don't think PWF is a national hit, i'd say that it's a massive hit.
AIIYL is on a confusing state. I don't know if it deserved to be listed as national hit. It was released at the same day with Mamamoo 'Yes I Am', MMM's song outcharted AIIYL then fall quickly but AIIYL is still on top. AIIYL's longevity is insane, the song started pretty well but not a front-runner. 64 weeks on Gaon Digital TOP100. Maybe its a national hit
DDDD. No explanation needed. Its Ddu-Du-Ddu-Du, the song that revolutionize Blackpink's career forever. The EP was a banger, B-side of the century 'Forever Young' is on that EP.
HYLT. Perhaps the second-biggest idol group song of 2020. The song started massively, and even got 12PAK eventhough the charts keep reforming for 3 times. Longevity-wise, currently on 24Hits TOP30 #31. Great start and great longevity. Indeed a national hit
Lovesick Girls 🤔. The song that i was underestimated, i didnt expect it to do this well. I dont think its a national hit yet, maybe it will after the song pass 18 weeks on MelOn TOP10 weekly chart. Currently 16 weeks on TOP10 (same like Nobody, D4, and HYLT). As for now it's still doing very well (#7). The MelOn reform is a disaster for some artists but its a blessing for Blackpink's song. I believe the song will surpass Cheer Up and Tell Me