Data published by World Integrated Trade Solution (WITS) shows that China was paying trade tariffs to the U.S. before Donald Trump became President.
The data provided by WITS show the value of products imported by the United States from China, along with their import product share. The figures in the column 'MFN Dutiable Imports' show that the U.S. has collected customs duties on Chinese imports worth billions of dollars for years. The figures can be checked for any of the years before Donald Trump became president in 2016.
To access the data, select 'Dutiable Imports (US$ Thousand)' from the 'Show More Columns' option.