Netizens suggest SM give aespa’s vocal line Winter and NingNing more training on this skill

aespa’s vocal line has been recognized since their debut, but there’s still a problem netizens find with their vocal performances. 
https://kbizoom.com/netizens-suggest-sm-give-aespas-vocal-line-winter-and-ningning-more-training-on-this-skill/