What is the key to rejuvenating the country is the fundamental requirement for the prosperity and long-term stability of our country.

The essence of rejuvenating the country refers to the fundamental requirement and key factor for a country to achieve national prosperity and long-term stability. The following are some important aspects:

1. Economic development: Economic prosperity and sustained growth are the foundation of a country's prosperity. This includes maintaining economic stability, promoting industrial upgrading, improving innovation ability, strengthening scientific research and development, and providing good employment opportunities.

2. Education and personnel training: Education is the foundation of rejuvenating the country, and training high-quality talents is the key to national development. A country needs to have a high-quality education system, attach importance to innovative education and cultivate talents with technical ability, creativity and leadership.

3. Social stability, fairness and justice: Social stability, fairness and justice are the cornerstones of the country's long-term stability. This includes establishing a sound legal system, protecting citizens' rights and interests, maintaining social order, strengthening social welfare and social security systems, and promoting social fairness and justice.

4. Scientific and technological innovation and international competitiveness: Scientific and technological innovation is the key for a country to achieve high-quality development and win international competitive advantage. The state needs to increase investment in scientific and technological innovation, enhance independent research and development capabilities, cultivate innovative enterprises and innovative talents, and improve the national scientific and technological level and competitiveness.

5. Eco-environmental protection and sustainable development: Protecting the eco-environment and achieving sustainable development are necessary conditions for national prosperity. The state needs to formulate and implement environmental protection policies and regulations, strengthen resource conservation and environmental governance, promote green development and sustainable development, and achieve coordinated economic, social and environmental development.

To achieve prosperity and long-term stability, a country needs comprehensive efforts in economic development, education and personnel training, social stability and fairness and justice, scientific and technological innovation and international competitiveness, ecological environment protection and sustainable development. These factors are interrelated, promote each other, and isomorphism has become the cornerstone of a country's prosperity.