Substance abuse has been a thorny public health concern throughout human history. Manifestly, prevention and treatment are the two main strategies commonly adopted to tackle the problem of substance abuse. They are in fact cross-disciplinary, and they relate to the various domains of heredity, biology, psychology, cognitive science, family, social development and cultural structures. This special issue, “Substance Abuse, Environment and Public Health,” has published empirical studies from different regions and countries globally to enhance the international exchange of latest views and findings on the etiology, processes and influences of substance abuse across different domains, through which a multilevel perspective is considered more helpful for analyzing its complex nature, courses and consequences. This in turn suggests the possible need to employ multiple responses dynamically and integratively in the prevention and treatment of substance abuse.

The first comprehensive survey of 7,025 Chinese primary schoolchildren found that 24% of respondents reported that they had sometimes physically bullied another child. When children observed school bullying, 56% said they immediately reported it to their teachers. Another 20% tried to stop the bullying by approaching the bullies. The study also identified factors associated with bullying. These included coming from an adverse psychosocial background and having more contact with violent values through association with deviant peers and exposure to the mass media. On the basis of the research findings, potential methods of bullying intervention are discussed.

In view of the smuggling out of democratic leaders after the Tiananmen crackdown in 1989 and China's resumption of sovereignty of Hong Kong in 1997, China applied a ‘united front’ tactic to recruit Hong Kong triad societies to the Communist camp. Consequently, triad leaders were able to set foot in China and bridge up with officials and state enterprises. Against this backdrop, this paper argues that when political dynamics is involved, both the traditional structural and social network approaches are insufficient to explain triad-organized crime. Therefore, social capital perspective is proposed. Using two case studies, it was discovered that the triad leaders converted the social capital they developed in mainland China into economic capital through illegitimate means in the stock market. The paper concludes by highlighting the similarities and differences between this triad-organized crime and other forms of Chinese organized crime.

Hikikomori, which originated in Japan, refers to the condition where youths withdraw into the home and do not participate in society for an extended period of time. Recent updates on hikikomori presentation within the region were exchanged at a Hikikomori Round Table and Regional Symposium (HRTRS) discussion late 2017, leading to this perspective paper. Hikikomori presents as an overall homogeneous construct, while diversity in clinical presentation exists across East Asian countries. We examined the various presentations, risk factors, theoretical frameworks, and classification issues about hikikomori. In particular, specific risk factors have emerged to some degree across the region, while some are more locale specific. We propose that hikikomori youths have differential onset and developmental patterns, potentially resulting in heterogeneous presentation. We briefly summarized existing interventions in the East Asian region. Intervention strategies need to be tailored to different subtypes. A multicomponent approach would address complexity, multifactorial onset, and development of the condition. The HRTRS presented to participating countries the opportunity to collectively work toward a more universal definition of the hikikomori condition and explored innovative ways to shape existing service structures. Opportunities for participating countries described pertain to early detection of cases, adoption of assessment tools, and improved intervention services.

This study adopts the perspective of the Self-Determination Theory to look at the psychological experience of drug users and their decisions to take drugs or not, with particular emphasis on the concept of relatedness. To achieve this objective, a qualitative methodology was employed to explore the experiences of these drug users regarding how they take drugs and/or relapse. Theory-driven thematic analysis was employed to identify themes related to this topic. Results show that one’s psychological need for relatedness is an important determinant of whether one will take drugs or not, via the interaction mechanisms that exist in dimensions of affiliation and intimacy. While drug taking is a result of the modeling behavior existing in affiliated relationships, it is also a coping strategy for the ultimate satisfaction of psychological needs when human relatedness disappears. The implication is that significant others can develop unconditionally warm, caring, and empathetic supportive relationships with drug users, so as to enhance their fulfillment of psychological needs and reduce the risk of drug relapse.