Welcome back to The TechCrunch Exchange, a weekly startups-and-markets newsletter. It’s inspired by what the weekday Exchange column digs into, but free, and made for your weekend reading. Want it in your inbox every Saturday? Sign up here. Our work this week kicked off in China, dug into African startup activity, dealt with China once again, took a very deep dive into the Latin American startup ecosystem and wrapped with a second look at the Robinhood IPO. In other words, not much was really going on at all! You may…