What and How the Tu Spy Signal Receiver was Declassified

In 2006, Shenghua Tu, the youngest son of Tu Zuochao, established a Tu Zuochao Exhibition in Xiliuhetun Village, Yanjiao Township, Sanhe City, Hebei Province. By 2014, it expanded to 20 show rooms, with almost 1,500 archives or artifacts on display.

In 2007, Yanhua Tu, the third son of Tu Zuochao, began his attempt at making an operational shapeless signal received based on what the father had said. He was successful after dozens of trials in 2009 after he finally realized that he would have never succeeded had he followed his father’s process.

The audience may also ask if there had been any other inventions by Tu Zuochao after 1940?

China’s Radioactive Detector Prototype in 1956

China began its atomic bomb engineering in 1955. The Soviet big brother did not want to see an independent Chinese atomic bomb. The Soviet Union refused to sell to China the radioactive detector, the must to find the uranium ores.

Tu Zuochao was the deputy chief of Technical Section of Shanghai Number 2 Heavy Industry Bureau of Shanghai in 1956. He joined in his colleagues Huang Weiyu and Wu Qiong and succeeded in copying the Soviet YP-4M radioactive detector. They made the prototype including the prototype of the Geiger tube, the primary instrument for the detector. These 3 pioneers had no lab, no workshop. The government budget for them was only Yuan 200 or US$ 80 equivalent.

In 2010, China aired a 40-episode TV series entitled Five Star Flag Flies In Wind. The 4^th Episode showed 15 seconds of a declassified documentary in Guangxi in 1956 when uranium ores were found. The 2 types of radioactive detectors used by the exploration team members on the screen were the same as in the drawings submitted by Tu-Huang-Wu via the Number 2 Heavy Industry Bureau in 1956. Shanghai Yamei Radio Works first produced the radioactive detector in 1956. Shanghai Era Electronic Instrument Works was set up to produce the same in 1957.