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San Mao was a very poor orphan. He was wandering in Shanghai where people dreamed of riches in the 1930s. Sanmao, together with his baldheaded friend Xiao Laizi received grain unexpectedly from the entrepreneur Wu Zifu. Later he fell into a coma mysteriously, and the reporter Hou Yiwen would try to investigate the relationship between Wu Zifu and San Mao.