The study period is from September 1, 2024, to December 31, 2025. The subjects are cancer patients from the medical center of this hospital. A block randomization will be used to assign 100 patients to the experimental group and 100 patients to the control group, totaling 200 patients. During the study process, questionnaires and medical records of the subjects will be collected. The experimental group will receive the social media "Happiness Ledger" intervention, while the control group will receive routine treatment. Questionnaires will be collected from both groups before and after the intervention.

Inclusion Criteria:

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Inclusion Criteria for Advanced Cancer Patients:

1. Patients diagnosed with stage III or IV cancer by a specialist physician.
2. Patients who agree to participate in the study after being informed about the research.
3. Patients who are conscious and able to communicate in Mandarin or Taiwanese.
4. Patients aged 20 years or older.
5. Patients with no history of mental illness.

Inclusion Criteria for Family Members:

1. The primary caregiver of a patient diagnosed with stage III or IV cancer by a specialist physician.
2. The primary caregiver who has a blood, marital, or cohabitation relationship with the patient.
3. Family members who agree to participate in the study after being informed about the research.
4. Family members who are conscious and able to communicate in Mandarin or Taiwanese.
5. Family members aged 20 years or older.
6. Family members with no history of mental illness.

Exclusion Criteria:

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Exclusion Criteria for Advanced Cancer Patients:

1. Patients in the experimental group and control group who reside in the same ward.
2. Patients who share a ward with subjects already included in the study.
3. Patients involved in ongoing medical disputes.
4. Patients who cannot understand the study explanation due to language or cognitive impairments.
5. Patients with a life expectancy shorter than the planned study duration.

Exclusion Criteria for Family Members:

1. Family members who do not have direct living or caregiving contact with the patient.
2. Family members who cannot visit the patient regularly or participate in the study.
3. Family members who cannot understand the study explanation due to language or cognitive impairments.
4. Family members with significant visual or hearing impairments who do not use assistive devices and cannot resolve communication issues.
5. Family members who cannot make independent decisions.