The Darien Gap route is viable for Chinese immigrants because they can fly into Ecuador without a visa. From Quito, they join Latin Americans to travel through the once-impenetrable Darién and across several Central American countries before reaching the U.S. border. The journey is well-known enough it has its own name in Chinese: walk the line, or 'zouxian.' Short video platforms and messaging apps have popularized the route. They provide on-the-ground video clips and step-by-step guides from China to the U.S., including tips on what to pack, where to find guides, how to survive the jungle, which hotels to stay...