The Wall Street Journal Chinese-Registered Ship Is Held in Baltic Sea Sabotage Investigation — Incident has triggered a multinational probe, and some officials say they suspect Russia’s involvement. China Is Building 30,000 Miles of High-Speed Rail—That It Might Not Need — The train system is one of the biggest public works in history, and it’s becoming a giant money pit. Baidu Revenue Falls Again as Advertising Demand Remains Weak — Sales from online-marketing services mak