“…Parents completed a Chinese version of the Strength and Difficulties Questionnaire (SDQ) (Goodman, 2001) at T1 and T2. The measure, which has demonstrated good psychometric properties in previous Chinese adolescent research (Huang et al, 2016;Liang et al, 2019), contains subscales for emotion problems (e.g., "Many fears, easily scared"), conduct problems (e.g., "Often fights with other children"), hyperactivity (e.g., "Restless, overactive, cannot stay still for long"), and peer problems (e.g., "Has at least one good friend"), and each subscale has five items, on a 3-point scale ranging from 0 = not true to 2 = certainly true. According to the official scoring guidelines, there four problem behavior subscale scores can be combined to generate a total adjustment problem score, with higher scores indicating more adjustment problems.…”