Liaoning yinling university for the aged. Liaoning Yinling University for the Aged, founded in 2009, is an educational institution specialized in organizing the elderly (middle-aged) groups, carrying out scientific and cultural learning and art promotion. The school has vocal music, dance, zhongruan and other courses. Zhongruan, short for tenor Ruan, and China play stringed instruments, which is a tenor instrument among Ruan instruments. It consists of a piano head, a piano stem, a round sound box, a piano code and a sound window.