Yang was born in 1896 to a merchant family in Beishan Village,
Xiangshan County, Guangdong (now part of
Zhuhai). He was the only surviving child of nine born to the family. He showed an interest in writing and poetry from a young age, gaining recognition for his works by age ten. He also spent some time studying in Japan. In 1919, Yang was an active member of the
May Fourth Movement. He developed the belief that
Marxism was the best means of securing China's future, the only "
scientific socialism", and over the next decade he frequently hosted fellow communists at the family home. Yang also began writing extensively, penning a series of forty-one articles in
Guangdong Zhonghua Xinbao under the collective title "World Doctrines". Subjects included
philosophical idealism,
materialism, and various approaches to socialism. Nineteen of these serialized articles dealt with Marxism. Yang's writings were published near contemporaneously with those of
Li Dazhao, who was active in northern China. They differed in their inspirations, however; Li drew from the works of the Japanese Marxist
Kawakami Hajime, while Yang was influenced by the writings of
Sakai Toshihiko – the founder and first general secretary of the
Japanese Communist Party. Yang also spread Marxist teachings through his interactions with labour, including teachers and railway workers; he organized workers in labour actions, travelling to
Hong Kong to help administer the
Canton–Hong Kong strike of 1926. Through these activities, in 1920 Yang met and formed a friendship with
Tan Pingshan, who had been writing on similar subjects in the
Guangdong Qunbao. ==Party membership==