Enormous changes are taking place at lightning speed in many areas beyond imagination: blockchain, the Internet of Things (IoT), autonomous vehicles, drone delivery, Smart-Farm, artificial intelligence (AI) in science and economy, wearable healthcare devices, and robotic surgery in medicine. The ancient Chinese strategy game of Go used to be exclusively played by humans. They now, however, continually lose to AI players. Child psychiatry is no exception, either vertically or horizontally. Particularly, "Disorders Usually First Evident in Infancy, Childhood, or Adolescence" categorized in DSM-III and DSM-IV [1,2] became known as "Neurodevelopmental Disorders" in DSM-5 [3]. Child psychiatry may need to address the continuum of mental conditions as they may manifest at different stages of life from infancy to late adulthood. The Korean Academy of Child and Adolescent Psychiatry (KACAP) has prepared for this transition. As mentioned in Young Sik Lee's guest editorial [4], KACAP organized a subgroup known as the "Adult ADHD Special Interest Group (AASIG)" to develop the Korean assessment tools for adults with ADHD and complete the practice parameter for intervention, which has been published in this issue [5]. As part of the preparation process for the practice parameter, AASIG surveyed the current practice for ADHD in adults from psychiatrists in Korea. The results were published in the previous volume [6]. In addition, AASIG developed and published the Korean Adult ADHD Rating Scale [7]. AASIG will report the results of the application of the Korean version of the Diagnostic Interview for ADHD in Adults-5 (DIVA-5), as well as the efficacy study of the cognitive function assessment tool, Computerized Korean Comprehensive Attention Test (CAT). To better understand ADHD as a neurodevelopmental disorder, AASIG will continue to engage with general psychiatrists. Crossing the boundaries of academic territory between pediatric psychiatry and related areas has occurred widely and very quickly. One of them is targeted on biomarkers for childhood mental disorders. Alexey Tinkov's "Magnesium status in children with attention-deficit/hyperactivity disorder and/ 4) Lee YS. The past four years research work of the adult attention-def