China's first chromatic keyboard harmonica is exhibited in the museum. It was made in 1954. [Photo/jntimes.cn]

China's first chord harmonica is exhibited in the museum. It was made in 1937. [Photo/jntimes.cn]

This harmonica which belonged to Deng Yingchao, wife of the late premier Zhou Enlai, is exhibited in the museum. Deng received it as a gift from a foreign person over 60 years ago. [Photo/jntimes.cn]