Inclusion Criteria:  Primary family caregiver of stroke patient (modified Barthel Index [mBI] <15; usually represent moderate disability) Able to read and communicate in Chinese Aged ≥18 Able to use mobile phone text messaging function PHQ-9 ranged from 5 to 19  Exclusion Criteria:  Professional medical personnel and professional carer Has provided care for <1 month prior to recruitment Has diagnosis of psychiatric disease or is currently taking psychotropic drug PHQ-9 ≥ 20 (i.e., severe depressive symptom) Currently participating in any type of psychological intervention (e.g., CBT)