Piano maker in tune with rising Chinese middle class

"I think profits will increase by 3 percent to 5 percent but it's very difficult to evaluate at the moment," Tong said.

Prices began rising in China last year after years of deflation. The firm has to buy strings, polyester and felt from overseas which Tong said is "very expensive."

The firm also grapples with power shortages which are plaguing China's rapidly growing economy. Since April, staff have taken off Friday and Saturday and worked on Sunday instead to conserve electricity.