The uncertainty has created volatility for PDD's stock price which fell 6% on Monday, rose 8% on Tuesday and fell more than 3% on Wednesday.
Critics of the de minimis provision say it's provided an unfair advantage to Chinese e-commerce companies, and created an influx of packages that are "subject to minimal documentation and inspection," raising concerns around counterfeit and unsafe goods.
Others have advocated for the de minimis exemption to remain in place, saying its removal would burden customs officials and lead to higher government costs.