Why are China IEEPA refunds larger than other countries?

“China was the only country subject to both fentanyl IEEPA tariffs (EO 14195, 20% cumulative) and reciprocal IEEPA tariffs (EO 14257, up to 125%) simultaneously. The stacking produced a 145% peak rate — more than seven times the 20% baseline most other countries faced. Additionally, thousands of Chinese products carried zero pre-IEEPA duty, meaning the full IEEPA surcharge is recoverable.”