China’s leaders moved to dispel perceptions of disarray in the management of the world’s second-largest economy, firing a top regulator and setting out specifics on how they intend to restructure the economy without having growth fall off a cliff. The departure of Xiao Gang as head of the China Securities Regulatory Commission is expected to be announced “within days,” officials with direct knowledge of the matter said Friday. It came amid what appeared to be a public campaign by Beijing in recent weeks to counter global pessimism about China’s growth prospects and economic stewardship. Mr. Xiao had been in the hot seat for months. He was the official primarily faulted for a bungled mid-2015 stock-market […]