In the "WHO-convened global study of origins of SARS-CoV-2: China Part" WHO claims:
“The documented rapid increase in all-cause mortality and pneumonia-specific deaths in the third week of 2020 indicated that virus transmission was widespread among the population of Wuhan by the first week of 2020.
The steep increase in mortality that occurred one to two weeks later among the population in the Hubei Province outside Wuhan suggested that the epidemic in Wuhan preceded the spread in the rest of Hubei Province."
In this thread I will show that this claim is contradicted by their own data.
Fig. 12. A: Comparison of trends of the all-cause mortality rate in 2019-2020 against average rate
for 2016-2018 in Wuhan, for all age groups;