China-focused private equity and venture capital firm CDH Investments will return capital to its limited partners by pledging shares in China-based pork producer WH Group worth an estimated HKD12.6 billion (approximately US$1.6 billion). CDH, which is still bound by a 12-month lock-up dating from WH Group's Hong Kong IPO in August, has agreed to mortgage 2.1 billion shares of China-based WH Group, or a 14 percent stake, in exchange for loans.