Jiang Chi - a commando of the Municipal Special Service Detachment, codenamed "Shan Ying". A master of martial arts with explosive physical fitness, cold on the outside and hot on the inside. Hidden under his tactical vest is a handwritten love letter to Lin Xi.
Lin Xi - a Chinese teacher in a key middle school, a gentle and talented girl who loves to write prose. The lesson preparation notes contained Jiang Chi's candid training photos, and the chalk dust contained concern for him.
