The authorities of the central province of Phu Yen was asked to bring two ancient stone musical instruments to an exhibition of the world's rare stone objects, to be held at the National Museum of Belgium.

The same invitation was also cabled from the authorities of Chung Bur province of the Republic of Korea.

These stone musical instruments, discovered in Tuy An district, are believed to date back to about the fifth century BC. They are counted among Vietnam's national treasures.