In the spring of 1942, deep in the jungle of Myanmar. Shen Hengzhi pressed the button of the modified transmitter, and the Japanese ammunition depot three hundred meters away exploded under the timing device. He was an overseas Chinese returned from Nanyang and a top student in the Mechanical Engineering Department of MIT. He joined the Anti-Japanese War with a complete set of remote control blasting technology drawings. Flying Tigers intelligence officer Shen Huaiyuan recognized him in the rubble of the explosion - his cousin who had been separated for twelve years. Before the joy of the brothers' reunion had dissipated, Su Wanting, chief of the counter-espionage section of the military command, came to visit: The characteristics of Shen Hengzhi's blast signal exactly matched the radio frequency of the Chongqing hidden spy "Jackdaw". Under the single-line contact rule, Shen Hengzhi cannot prove his innocence to anyone. He can only use knowledge to reduce dimensionality to counterattack: use cryptography principles to reconstruct the radio station, use mechanical gears to create timing traps, and leave a unique engineering signature at every step. Tomoko Tanaka set up a series of tricks to get her most trusted comrade Chen Yanqiu to sign the tail-docking agreement. When Shen Huaiyuan blocked the bullet for him, the brother in the pool of blood only said one sentence: "There is a third gear on the remote control." Shen Hengzhi discovered that there was an additional name on the unfinished time bomb that should not appear...
The night breeze in Tengchong City is smelling of moss and pours in from the end of West Street.
Chen Huaiyuan stepped very lightly, stopping every ten steps to listen to the movement behind him. There was only his own shadow in the alley, stretched and swallowed by the searchlight of the distant sentry.
He had recited the joint rules silently three times this morning: if the signal is not right, retreat, locking the door from the outside is a dead end, and there is a dog hole in the backyard of the coffin shop. People who have a single line of contact have only one life, and the rules are the second.
As he turned the corner, he
