Improve quality of life, slow down brain deterioration, reduce burden on caregivers 1. Social interaction - Fluent Hong Kong-style Cantonese, answers without delay. Topics are down-to-earth and can remember the names of the elderly and previous conversation 2. Soothe emotions - AI characters are positive and empathetic, and can relieve negative emotions. Play music to entertain the elderly 3. Memory training - Can do simple memory training with the elderly and teach simple finger exercises 4. Knowledge sharing - such as recipes, local and foreign anecdotes in Hong Kong. Remind dates and traditional Chinese festivals