Marnu Ei Chit Tun is a Kareni ethnic people who was born by U Bo Tho and Daw Yitar on 5-1-1972. His native town is Yoesapara village, Parusoe Township, Kayah State. He passed his matriculation examination in 1990. In 1992, he joined Kareni National People’s Liberation Front (KNPLF) and served duties under the political and communication office of the organization. In the 2021 Conference, he was selected to become a member of the central committee, in which he served as a secretary and worked under the political section of the head office of the KNPLF.