Rietmüller pianos are Germany’s famous high-quality products. It was founded and produced in August 1795 by William Rietmuller. In various countries around the world, this old piano has attracted much attention for its perfect tone, and it is also one of the top ten piano brands with the most "cultural appeal" in Europe.

Pearl River Piano uses "Rietmuller" as the trademark of its high-quality piano series to distinguish it from the "Rearl River" brand which has a competitive advantage in the low-end market. Designed and improved by famous European designers, and produced in the new factory in accordance with German technical experience and traditional manufacturing techniques, a variety of high-quality upright pianos were designed and produced for "Rittmuller", making it a leading player in the Pearl River Piano Industry. The main force in entering the high-end market.

In early 2004, Pearl River Piano Group Company established Pearl River Piano Group Europe Co., Ltd. in Munich, Germany. This was also the second branch established by Pearl River Piano abroad after the American branch. In the same year, "Rittmüller" sold more than 3,000 units in Europe, most of which were high-end grand pianos. Until now, Rietmüller is the best-selling piano in Europe, and its sales network covers basically all countries in the European Union.