Ex-Chart Thai chief adviser Sanan Kajornprasart (4th, L), Ruam Jai Thai Chart Pattana leader Chettha Thanajaro (5th, L) and other representatives from four former coalition parties attend a press conference at Four Seasons Hotel in Bangkok, capital of Thailand, Dec. 9, 2008. Four former coalition parties, including Chart Thai, Puea Pandin, Ruam Jai Thai Chart Pattana and Matchimathipataya, announced on Tuesday that they will back the Democrat leader Abhisit Vejjajiva to form a new government.[Niu Xiaolei/Xinhua]