When President Ho Chi Minh's family lived in Hue, Mr. Nguyen Sinh Sac was acquainted with Teacher Ngon. At that time, Mrs. Ngon was seriously ill, so he asked Mr. Sac to cure her. Due to good medicine and caring treatment, Mrs. Ngon gradually recovered and returned to normal. Teacher Ngon's family was very grateful to the kind-hearted Nghe doctor who often gave treatment to the poor without taking money, and so was loved by many people. Since then, the two families became even closer. Once, Teacher Ngon invited Mr. Sac to his house to have an intimate diner, where Nguyen Sinh Khiem, Nguyen Sinh Cung (President Ho Chi Minh) and Teacher Ngon’s son, Cao Dinh Luyen also attended. The tray is placed on a wooden camp bed in the middle of the house.

After the successful August Revolution, Mr. Cao Dinh Luyen often told his son Cao Chi Thanh: “Doctor Sac was a good-natured and patriotic man. His son, Mr. Nguyen Ai Quoc, who used to have a dinner with our family, contributed great merit to the country's independence nowadays.” At that time, Mr. Cao Chi Thanh participated in revolutionary activities and then joined the National Guard. After Mr. Cao Chi Thanh moved to the North, in 1957, Mr. Cao Dinh Luyen died. Before his death, Mr. Cao Dinh Luyen handed over the tray to his son-in-law Tran Huu Uyen. On the day the South was completely liberated, Mr. Cao Chi Thanh came back, and Mr. Tran Huu Uyen handed the tray back to Mr. Cao Chi Thanh.

Mr. Cao Chi Thanh is the paternal grandson of Mr. Cao Dinh Ngon, commonly known as Teacher Ngon. In 1996, Mr. Cao Chi Thanh presented the jackfruit wooden tray to the Ho Chi Minh Museum of Thua Thien Hue to display and promote its value.

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