The statement is strongly supported by multiple credible news sources. Evidence from Investing.com and Reuters, both citing a report from the Financial Times, directly states that China's customs authorities have increased scrutiny and stepped up enforcement on imports of Nvidia's AI chips. This is further corroborated by another source detailing nationwide inspections on semiconductor imports by Chinese authorities. The remaining evidence provides context on the broader US-China chip trade tensions but does not contradict the core claim.