He was detained for allegedly fabricating and spreading false information about the stock market. ChinJournalists’ rights group Reporters Without Borders last week said it was “absurd” to blame China’s stock market crash on a reporter. Authorities have also detained an official from the securities watchdog and four senior executives of Citic Securities. Many social media accounts had been closed. Chinese shares continued their slide on Monday, with Shanghai down 1.45 percent in the afternoon. Beijing has launched interventions on a grand scale to try to shore up plunging share prices.