The embattled Internet tycoon behind struggling Chinese tech company LeEco has resigned from all his positions at the company’s publicly traded arm, the latest action in a stunning fall for one of the country’s most flamboyant tech leaders. Jia’s departure from Leshi Internet ended his tenure at the helm of one of China’s most ambitious tech companies. Last week, a court in Shanghai froze $182 million of assets tied to Jia, and Tuesday, shares connected to Jia totaling 40 percent of Leshi...