A Study of the Effect of Laughter Therapy on the Mental Health and Quality of Survival of Hematopoietic Stem Cell Transplant Patients

Inclusion Criteria: Patients with a pathologically confirmed diagnosis of hematologic malignancy; Patients undergoing their first hematopoietic stem cell transplant; Age ≥ 16 years; Those who have some reading and writing ability; Those who can cooperate in completing the questionnaires and assessments; Informed consent and voluntary participation in the study. Exclusion Criteria: Those with severe mental illness or personality disorders; Those who cannot operate a smartphone independently; Those with severe visual and hearing impairments; Those who are critically ill and cannot receive the intervention.