It serves international flights to Bandar Seri Begawan , Shenzhen , Seoul , Shanghai , Guangzhou , Hong Kong , Macau , Manila , Cebu , Singapore , Taibei , Gaoxiong , and other domestic cities . Some destinations include : Bandar Seri Begawan , Shenzhen , Seoul , Shanghai , Guangzhou , Hong Kong , Macau , Manila , Cebu , Singapore , Taipei , Kaohsiung , and other cities , both within and outside of Malaysia .