Riethmuller piano is a famous quality product in Germany. It was written by William in August 1795. Riethmuller created production. In every country in the world, this old piano has attracted much attention because of its perfect timbre, and it is also one of the top ten piano brands with the most "cultural appeal" in Europe.

Zhujiang Piano regards "Riethmuller" as the trademark of high-quality piano series to distinguish it from the brand "Rear River" which has competitive advantage in the low-end market. Designed and improved by famous European designers, and produced in the new factory according to German technical experience and traditional production technology, a variety of high-quality upright piano were designed and produced for "Riethmuller", making it the main force for Pearl River piano to enter the middle and high-end market.

At the beginning of 2004, Zhujiang Piano Group established Zhujiang Piano Group Europe Co., Ltd. in Munich, Germany, which is the second branch of Zhujiang Piano established abroad after the American branch. In the same year, Riethmuller sold more than 3,000 aircraft in Europe, most of which were high-end grand piano. Up to now, Riethmuller is the best-selling piano in Europe, and its sales network basically covers all EU countries.