Table 3.

Typical relational structure of the main category.

Typical relationship structure	The connotation of the relationship structure
Social realistic demand – external drive – supply effect	Social realistic demand is the external driving force that affects the supply effect of government purchase of older adults care services.
Government power and responsibility system – fundamental guarantee – supply effect	The government power and responsibility system provides a fundamental guarantee for the supply effect of the government’s purchase of older adults care services.
Government governance ability – direct decision – supply effect	The governance ability of the government directly affects the supply effect of the government’s purchase of pension services, which is the most important part of the four factors.
Social undertaking capacity – necessary support – supply effect	The social undertaking capacity is the necessary support for the supply effect of the government’s purchase of older adults care services. The cooperation and coordination with the government have a significant interaction effect and a positive synergistic effect.