After Yang Zhenning broke up with Li Zhengdao, both claimed that the paper they collaborated on winning the Nobel Prize was written by themselves.
Who should we trust? Let's look at the evidence.
Yang Zhenning said that at the end of May 1956, he had severe back pain and was bedridden, so he dictated that his wife Du Zhili had written the paper.
Because Du Zhili was not a physics major and had no secretarial training, he was handwritten word by word. The title of the paper is "In the Weak Action, Are Cosmology Conserved?" The paper was shown to Li Zhengdao, who made several minor changes.
Once the first draft was written, it was given to Miss Keck, the secretary of brookhaven laboratory department, for printing and marked with the number brookhaven national laboratory.
Mr. Lee later claimed to have written the paper himself, but he couldn't produce evidence. Moreover, it is also said that Du Zhili is not a physics major, and it is impossible to write such a complex physics formula, which proves that Yang Zhenning said that Du Zhili's handwritten paper is impossible.
Instead, Yang Zhenning came up with a trick and fought back against Li Zhengdao.
Yang Zhenning copied the original manuscript of the original paper from Brookhaven Laboratory (the unit yang Zhenning visited at the time).
The original manuscript showed that the formulas on the paper were written by hand, because the printer at that time could not print these formulas, and after the printed draft came out, Yang Zhenning personally added these formulas, which strongly explained Li Zhengdao's statement to the public that Du Zhili could not write the formula.
These handwritings and Brookhaven Laboratories can corroborate this.
From this, there is reason to believe that in the weak action, is the cosmology conserved? The Nobel Prize-winning paper was written by Yang Zhenning. (When it was published, the title was changed to "Questioning the Conservation of Cosmology in Weak Action", because the editor at the time did not like the question mark.)