A self-exiled billionaire Chinese business tycoon once believed to be among China’s wealthiest men was sentenced on Monday to 30 years in a US prison for a massive financial fraud that a federal judge said cost over 1,000 people worldwide hundreds of millions of dollars. Guo Wengui, who fled China a decade ago and reinvented himself as a US-based Communist Party critic, was sentenced in a Manhattan courtroom packed with his supporters by Judge Analisa Torres. She said he “preyed on those seeking...