In 1990, U Oo Hla Saw joined the
Arakan League for Democracy (ALD). However, ALD was later banned (as part of broader suppression of ethnic‑based political activity) by the Myanmar military government. In 2010, he became a founding member of the
Rakhine Nationalities Development Party (RNDP), serving as its general secretary. He was a key figure in the Rakhine National Conference held in
Kyaukphyu, from 27 April to 1 May 2014. He additionally expressed interest for building positive relations with the
Kachin people. He raised concerns about the large Chinese oil terminal on
Ma Day Island. Despite the development, the nearby Rakhine villages remain very poor with bad roads and low living standards. After the military coup in Myanmar on 1 February 2021 and the collapse of elected institutions, many ethnic‑Rakhine politicians reconsidered their strategies. Hla Saw, then joined the
Arakan Army. From 2022 and onwards, he served as the Political Director of AA's Central Political Department. He attended the junta-organised Union Day event which was held in
Naypyidaw being representative to the ULA. ==Writing career==