From Hoover's memoirs: The Cabinet & the Presidency
here's a 2018 Harvard MA thesis on Hoover's dishonesty in his long campaign to make himself look like an innocent bystander in the Chinese business that made him an extremely rich man https://dash.harvard.edu/bitstream/handle/1/37945078/KARLSSON-DOCUMENT-2018.pdf?sequence=1&isAllowed=y
here's a 2018 Harvard MA thesis on Hoover's dishonesty in his long campaign to make himself look like an innocent bystander in the Chinese business that made him an extremely rich man https://dash.harvard.edu/bitstream/handle/1/37945078/KARLSSON-DOCUMENT-2018.pdf?sequence=1&isAllowed=y