In the Tianjin Concession in 1939, Western-style buildings intertwined with alleys, and the iron hoofs of the Japanese army shattered the peace. {Su Wanqing} guards the ancestral "Wanqing Embroidery Workshop", and the embroidery needles on her fingertips hide secrets - she uses "coded embroidery thread" to embroider encrypted information on the cheongsam. The needlework is sparse and secret, and the numbers are secreted. It is developed with specific light and uses embroidery as a medium to convey military information.
Shen Yanzhi is the decent comprador of a foreign company in the concession, and is also her recipient of information. There is an unspoken understanding and affection between the two of them in the teahouse and the foreign company. Japanese and puppet spy Keiko Matsumoto disguised herself as an embroidery buyer and repeatedly tested her, even seizing cheongsams that contained information about the Japanese arsenal.
Su Wanqing used the embroidery needle as a shield and replaced key embroidery traces with ordinary embroidery thread to avert danger; Shen Yanzhi paved the way in the dark to protect her. On that day, the intelligence of the Japanese army's "mopping up" plan was hidden in a cheongsam with a crabapple pattern. The two worked together to break through the concession checkpoints and dock blockades, and finally sent the intelligence to the base area. The code woven with embroidery thread helped our army smash the enemy's conspiracy, and embroidered the deep love for home and country in the war of troubled times.
