4k ancient style illustration. cai wenji, a beauty of the han dynasty with long black flowing hair. wears a ruqun and armor with light yellow and cyan-white patterns. holds a cyan sword. stands quietly on the water. in the background, there is a chinese sailing ship. surrounded by water splashes. several flying birds soar in the sky. full-body view. cold-toned atmosphere. yoshihiko yoshida style. with game cg quality. no modern elements. delicate changes in light and shadow.