The Progressive Democratic Party (PDP) is open to merging with other parties following its merger with Parti Sarawak Bersatu (PSB) recently.br br Speaking at the Malaysia Convention & Exhibition Bureau (MyCEB) Hari Raya Open House on Monday (April 22), PDP president Datuk Seri Tiong King Sing said that PDP’s openness is for the well-being of the country, especially Sarawak.