It should have been done between 1965 and 1968.
This poem says, "There is no autumn behind spring, so why worry about age." It should have been written by him near his later years, with a sense of sighing about age; and the information says that this poem was written in Guo Xiaochuan wrote it in the May 7th Cadre School after he was sent to work. It should have been the period after the 1960s, and an introduction in 2005 said that this poem was already written 40 years ago. From this, it can be inferred that the origin of this poem The time should be around 1976, and Guo Xiaochuan passed away in 1976.