A math genius gets recruited by Chinese spy agency to crack a complex coded message in the early republican era.
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Ying Er
Zhai Li
Chen Xuedong
Rong Jin Zhen
Jing Chao
Zhao Qi Rong
Zhang Zhehan
Han Bing
Yin Xiaotian
An Neng
Guo Jingfei
Zheng Dang