Profiles and transition patterns of bullying and victimization among de facto unattended children in ChinaJuzhe Xi4/25/2026Humanities and Social Sciences Communications, Published online: 25 April 2026; doi:10.1057/s41599-026-07259-z Profiles and transition patterns of bullying and victimization among de facto unattended children in Chinabullyingchild-developmentsocial-science