Technical cooperation has also deepened. Since 2024, China and the US have held several meetings of antidrug technical experts and established a scientist exchange mechanism.

　　Experts from Chinese and US agencies have shared drug-testing experience and discussed ways to strengthen technical support for addressing the fentanyl issue.

　　In February, cross-departmental antidrug delegations from the two countries held the 11th China-US antidrug intelligence exchange meeting in the US. They discussed issues including the global and regional drug situation, removal of online illicit information, joint case handling, chemical control, and anti-money laundering efforts related to drug crimes.

　　Joint case handling has produced concrete results. In February 2025, Chinese antidrug authorities and the China Coast Guard, acting on tips from the DEA, seized more than 4,900 kilograms of methamphetamine and arrested seven suspects in waters near Huangyan Island in the South China Sea.

　　China has also strengthened control of narcotics-related substances and precursor chemicals. In July 2024, the nation placed 46 new psychoactive substances under control, while in September that year, it added seven chemicals, including three fentanyl precursors, to its controlled precursor chemicals list.

　　In November 2025, China adjusted its export management catalog for precursor chemicals to specific countries and regions, adding the US, Mexico and Canada to the list and placing 13 additional precursor chemicals under export controls for those destinations.