Kublai was born in
Cotabato City but grew up in
Davao City. He is a descendant of settlers from Ilocos. His paternal grandfather, Simeon F. Millan, was one of the two editors of the 1952 Cotabato Guidebook (a major source in Mindanao historiography). His father, Rey Ernesto Millan, was a leading mover in the bamboo industry. He studied
Fine Arts at the
University of the Philippines Diliman. After graduating, he returned to
Davao City, painting and sculpting subjects relating to the culture of his home island. Mindanao has been the dominant subject matter of his art. Kublai started his career when he made all the artworks both inside and outside of his family's hotel, Ponce Suites, in
Davao City, which is managed by his mother. He has since produced more public monuments and murals, and along the way his paintings have gained the attention of collectors. In 2010, he was commissioned to make the Nativity Scene at
St. Peter's Square in the
Vatican, the first non-Italian artist to be thus commissioned In 2017 Davao City conferred him with the Datu Bago Award, and in 2022 he was given the Gador Award by the
Cultural Center of the Philippines for his work in promoting Mindanao's culture and arts. == Monuments ==