[5][6] Oo Zun was born on 7 August 1868 in the royal capital Mandalay, during the reign of King Mindon of the Konbaung dynasty.

[4][7] At the age of 18, she built a temple named Ruby Monastery using her own money and achieved the RMD Award given by Badamyar Sayadaw, which earned her the nickname "Payarama".

Consequently, she devised a plan to establish an elderly care center, ensuring individuals could freely practice their own religion without any religious implications.

During their visit, the Prime Minister wrote a report praising Oo Zun for her diligent efforts in managing the Mingun Buddhist Infirmary.

[11][12] Following Daw Oo Zun's passing, U Maung Gyi (BIA) assumed leadership of the association and diligently managed the Mingun Buddhist Infirmary.

In 1952, the Mingun Buddhist Infirmary received official registration with the Department of Social Welfare, marking the beginning of its second level support from the government.