Literature Reference: 有泪人还泣，无情雪不知。——《雪后过集贤裴令公旧宅有感》 Tears still fall from those who weep, yet the heartless snow knows not. Source from 'After the Snow, Passing by the Old Residence of Lord Pei of Jixian'.
无: No, it's clean, won't happen.
情: Emotions and circumstances. The psychological state of emotional fluctuations induced by external events and situations.
Meaning: Heartless implies a lack of emotion or indifference, describing someone or something devoid of emotional fluctuations.