Spy intelligence work prevailed in the Period of World War II, when there was already a complete spy system, the Japanese army in the occupation of our country, it trained a lot of spies, in order to be able to hide in our country faster, so these spies are Chinese, have to say that these traitors are really cruel.
Between 1937 and 1944, the Japanese army launched a fierce air raid on Chongqing, Chongqing city is full of ashes, everywhere is bombed buildings, but the most strange thing is that Japan almost has clairvoyant, each bombing can find important facilities, its military factory in Chongqing at that time was bombed several times in a row, and even just moved to a new place not long, the Japanese army will bomb this place, it is obvious that there are spies from the Japanese army inside Chongqing.
According to intelligence, the Japanese army trained a large number of intelligence spies in Nanchang and dispersed them to various major cities to provide intelligence for the Japanese army. After the Kuomintang learned of it, it immediately began to conduct a detailed investigation, and after investigation, there was always a mysterious code in Chongqing, but when the Kuomintang agents recorded it, they found that they could not solve the mystery. After several twists and turns, the agents caught the beautiful female spy code-named "Ume", and after the interrogation was fruitless, they had to shoot her, and the code was never unlocked.
It is worth mentioning that this female spy code-named "Wumei" is also a Chinese, and shortly after her death, the same code as her reappeared in other places, which has also become an unsolved mystery. It wasn't until 64 years later, when Feng Xiuying moved away the grave of her grandparents, that she knew that "Wumei" was her grandmother.
There was also a telegram recorded with a tape recorder, and when she opened it, she never knew what it meant. At this time, her daughter hummed to the rhythm of the telegram, which turned out to be a tune, and the spy hid the information in the tune, which solved the doubts in it, and this telegram that made the Kuomintang agents puzzled was inadvertently cracked by his granddaughter after 64 years.