What is the core of a strong culture?

Values and belief system.

The system of values and beliefs is widely accepted and closely attached by members of the organization, which is relatively organized. Strong culture emphasizes the importance and fit of enjoying value, and tends to have clear goals, commitments and loyalty, as well as pride in work and values that can be used as reference standards in decision-making. A key feature of a strong culture is its independence and autonomy, which encourages individuals to rely on their own strength and wisdom to solve problems, rather than relying on external help or luck.