The DEA agent staring at the spreadsheet had a problem. The numbers were clean. Too clean. A bubble tea shop in Monterrey, Mexico was processing roughly $300,000 in monthly transactions through a bank account in Guangzhou. Not unusual on its face – legitimate business, cross-border trade, plausible enough. Except the

There is a version of this story where it never happens. Where Warren Buffett - the man who spent 40 years telling anyone who'd listen that he doesn't invest in things he doesn't understand - looks at a battery company in Shenzhen, China, run