City High's school motto was "Honest, Respectful, Brave, Perseverant." Chang Pao-tai of the seventh graduating class felt that City High's spirit was the spirit of the seafaring; mutual cooperation and upright character were its expression.
「市中」的校訓是「誠敬勇毅」，在第七屆校友張保泰的感覺中，「『市中』的精神就是『海洋精神』，互助和耿直正是其表徵。」