SHANGHAI, May 17 (Reuters) - Shares of Chinese property developers opened up on Friday ahead of a press conference later in the day by China's housing and financial regulators regarding policies to ensure housing delivery.

Hong Kong's Hang Seng Mainland Properties Index rose 1.5% at open, while China's CSI 300 Real Estate index added 1.2%. (Reporting by Shanghai Newsroom; Editing by Muralikumar Anantharaman)