Background: Globally and nationally, malignant tumors persist as the leading cause of high incidence and mortality rates. In Taiwan, cancer tops the list of causes of death, with the elderly being predominantly affected, especially by lung cancer, which is the most prevalent type with the highest mortality and incidence rates in the nation. The Patient Autonomy Rights Act, implemented by the government in 2019, is designed to promote advance medical care consultation in medical institutions, respecting patient's autonomous decisions. In Chinese culture, medical decisions are typically family-oriented rather than individualistic, leading the elderly to frequently rely on their relatives'choices. This cultural practice may prevent meaningful conversations between potential agents and the elderly, causing misunderstandings of the elderly's preferences and affecting the consistency of medical decisions. Presently, interventions like board games for Advance Care Planning (ACP) are not well received, highlighting the need for more captivating content in intervention strategies.

Inclusion Criteria:

1. lung cancer age ≧ 60
2. The elderly with lung cancer are conscious and have no severe visual or hearing impairment.

3.3. The potential agent is designated by the elderly person with lung cancer who may be a family member who may make medical decisions in the future. The potential agent must be at least 18 years old.

Exclusion Criteria:

1. People with severe hearing loss and visual impairment who are unable to communicate in Mandarin and Taiwanese.
2. The potential agent is under 18 years old