"Yi Bi Cheng Qiao" (skill achieved in one brushstroke) is a key concept in Xieyi, emphasizing precision, confidence, and spontaneity in each brushstroke, aiming for efficiency, expressiveness, and a seemingly effortless display of skill, acquired through dedicated training and a deep connection with the art form.
Spontaneity is crucial in Xieyi painting, reflecting the emphasis on intuition, direct experience, and the expression of immediate feelings, allowing the artist to embrace imperfections and work in the moment, aligning with the principles of Chan Buddhism.