Methamphetamine

Chinese police have arrested a Chinese college chemistry professor for joining forces with a drug kingpin.

Call it “Breaking Bad: China Edition.” More than 3,000 police officers equipped with helicopters and motorboats and accompanied by dogs descended on a southern Chinese village notorious for making crystal meth, seizing 3 tons of the drug and 23 tons...

Records of large drug busts involving meth in recent years—an increasingly common occurrence—tend to show a trail that leads back to China.