HONG KONG, Sept 27 (Reuters) - Shares of China Evergrande’s electric car unit China Evergrande New Energy Vehicle Group plunged as much as 23% on Monday after it warned it faced an uncertain future unless it got a swift injection of cash and after it said it will not proceed with plans to issue RMB shares. The warning after the market closed on Friday was the clearest sign yet that the property developer’s liquidity crisis is worsening in other parts of its business. (Reporting By Anne Marie Roantree; Editing by Muralikumar Anantharaman)