US secretary of state Antony Blinken will seek China’s cooperation in curbing the production of the deadly synthetic opioid fentanyl during his two-day visit to Beijing, one of several contentious issues that the high-stakes diplomatic outreach will touch on. Aides to Blinken have said the issue will feature prominently in discussions between US and Chinese officials during the trip as the US seeks China’s help in curbing Chinese manufacture of precursor chemicals used to create the drug that helped drive more than two-thirds of 100,000 American overdose deaths in each of the past two years. “Blinken held candid, substantive, and...