Qi (vital energy) is fundamental to Xieyi brushwork, representing the expressive quality and energy within each stroke, achieved by the artist's balance, focus, and connection with their subject, emphasizing spontaneity and imbuing the artwork with a sense of vitality and inner spirit.
"Spirit of the Brush" (bǐyì) is central to Xieyi, emphasizing the unique expressive quality and energy that emanates from the brushstrokes, reflecting the artist's inner state, personal vision, and technical mastery, with each brushstroke imbued with intention, life, and a sense of spontaneity.