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He was born in Binh Truoc, Biên Hòa, Đồng Nai Province, but his parents were originally from Hải Dương Province. His grandfather was the headmaster of a school in Huế and was awarded the king of Vietnam's gold ring. Ẩn's father was a high-level engineer of the Public Administration Department. His family's service to France did not earn them French citizenship. Phạm was born in Biên Hòa Hospital with the help of French doctors.