In the words of Grandmaster Yang Chengfu in "Ten Essentials of Taijiquan": "Sink the shoulders and drop the elbows. To sink the shoulders means to relax and allow them to hang down. If they cannot be relaxed and allowed to hang down, then the two shoulders will lift up, and the qi will also rise, causing the entire body to lose strength. To drop the elbows means to let the elbows hang down loosely. If the elbows are raised, the shoulders cannot sink, and the opponent can easily break your structure, similar to the external martial arts' concept of breaking power."
The fundamental characteristics of Yang-style Tai Chi Chuan are natural, gentle, and graceful, making the practitioner feel comfortable during the movements. When practicing Tai Chi, one should focus on demonstrating the features of relaxation, stability, slowness, and evenness. On this basis, gradually learn to use internal energy, achieving a state of relaxation, expansiveness, connectivity, and emptiness.