Subtitle: A transceiver made by Li Qiang and others in 1929

Our CCP radio communication goes back to the end 1929.

In June, 1928 the CCP 6^th National Congress was secretly held in a Moscow suburb. As an audience delegate, Tu Zuochao attended this national congress. During the congress, Zhou Enlai had a talk with Tu Zuochao.

Interviewee Shenghua Tu, son of Tu Zuochao, says: Tu Zuochao came from Hunan Province. His Hunan accent was a bit difficult to Zhou Enlai who came from Jiangsu-Zhejiang Provinces or (his wife) Deng Yingchao (another audience delegate) who had lived in Henan, Guangxi and Tianjin. Therefore they said (to Tu Zuochao)， well for the convenience sake, let’s call you Carpenter.

Subtitle: photo of a planer Tu Zuochao had used.

Later on, Carpenter became the code name for Tu Zuochao in his secret service life.

Photo of Tu Zuochao on screen again.

Subtitle: Tu Zuochao, born in Changsha, Hunan in 1903, joined in CCP in 1924

Subtitle: Orient Communist Labor University, Moscow

In 1925, young Tu Zuochao went to the Soviet Union. He firstly learnt his fundamental courses at Moscow Orient University. Later he was sent to Leningrad Vorlongchi Military Communication School majored in radio communication.

Subtitle: Student admission form of Tu Zuochao (in 1925)

However, it was in the second year of Tu Zuochao’s overseas study that the Americans greatly succeeded in their intercontinental radio communication through their facilities on the lawn of Standford University in California. Very soon, the radio waves of the Nationalist government were frequently flying to and fro throughout China. At that time Morse codes were mostly used by the Nationalist government. It was a most basic and simple telegram method. That is，words were represented by a number of long and short signals. When referred to the secret code book, the signals were converted back to the words.