Chinese tech companies are quietly pulling back from doing business in Russia under pressure from U.S. sanctions and suppliers, despite calls by Beijing for companies to resist overseas coercion. Several major companies are curtailing shipments in Russia, where Chinese tech firms dominate the market for many products, without making any public announcements, according to interviews with people familiar with the matter. They include PC giant Lenovo Group Ltd. and smartphone and gadget maker Xiaomi Corp., the people said. In contrast to many Western firms, the companies have avoided making public statements about Russia‚Äôs war in Ukraine or their business there as Beijing opposes Western sanctions . […]