Pong is a district of Phayao province in northern Thailand. Neighboring districts are Song Khwae, Tha Wang Pha, Mueang Nan of Nan proviā¦Pong is a district of Phayao province in northern Thailand. Neighboring districts are Song Khwae, Tha Wang Pha, Mueang Nan of Nan province, Chiang Muan, Dok Khamtai, Chun and Chiang Kham of Phayao Province.