The global heads of German automakers BMW and Mercedes, as well as chip giant Qualcomm are among foreign business leaders due to meet with Chinese President Xi Jinping this week, two sources said on Thursday. The meeting in Beijing planned for Friday comes as Chinese authorities seek to bolster ties with foreign companies amid a drop in investment and in the face of U.S. tariffs targeting the world's second-biggest economy. The meeting follows on from last weekend's China Development Forum (CDF), a flagship business event that this year saw Premier Li Qiang urge countries to open their markets and combat "rising instability and uncertainty".