China-based alternative asset fund manager CDH Investments has invested HKD250 million (approximately US$32 million) in Hong Kong-listed jewelry manufacturer and designer Tse Sui Luen Jewellery (International) via the purchase of convertible bonds. CDH has an option to purchase additional convertible bonds worth up to HKD200 million (approximately US$26 million). The net proceeds from the sale will be used for general corporate development and working capital requirements.