A truly intelligent person is not just surface-level cleverness and skills, but possesses a stable and convergent internal cognitive structure: able to think about problems from a holistic and long-term perspective; solving problems with systematic rather than fragmented methods; able to clearly see the goal and choose efficient paths, without over-obsessing over superficial shortcuts; communicates concisely and effectively, and makes good use of key leverage points in actions; remains clear-headed and humble about the unknown, maintains understanding and empathy toward others; has the ability to delve into the essence, and also knows how to weigh trade-offs in a complex world, always leaving room for uncertainty.