· Exquisite password setting: The difference in corner angle of the cheongsam embroidery, the arrangement of gemstones and the twist of silk threads form a three-layer nested password, which combines aesthetics and spy logic.
· Female hero narrative: Using softness to overcome strength, using needle and thread as a knife, breaking the traditional male-dominated paradigm of spy dramas.
· Historical texture: Shanghai's Hongkou, Pudong, Tilanqiao and other landmarks in 1943 are truly restored, and details such as Ruifuxiang and Chinachem Hotel enhance the atmosphere of the times.
·Image ending: The trembling of the saber tassel runs through the whole text, and finally completes the intelligence closed loop, with a structure as exquisite as gear bites
