Microsoft Corp. has shut down the Internet journal of a Chinese blogger that discussed politically sensitive issues including a recent strike at a Beijing newspaper. The action came amid criticism by free-speech activists of foreign technology companies that help the communist government enforce censorship or silence dissent in order to be allowed into China's market. Microsoft's China-based Web log-hosting service shut down the blog at the Chinese government's request, said Brooke Richardson, group product manager with Microsoft's MSN online division at the company headquarters in Redmond, Washington. Though Beijing has supported Internet use for education and business, it fiercely polices...