Recently, Rizhao City Donggang District Science and Technology Bureau accepted a group of patent award applications, which is a group of patented technologies that can break through the European technology blockade.

This group of patents is the three technologies for the production of special grinding wheels for crystal diamond cutting. This technology was first created in the 1950s by Daniel Swarovski, the famous crystal processor of Austria and the founder of the world's first brand. This innovation has made Bohemia's crystal price rise and is famous, Swarovski. The brand thus became the world's crown of crystal and crystal diamond products, and also led to the Czech Republic on the other side of the Rhine. At present, this type of grinding wheel has been produced in Rizhao Street in Donggang District. This grinding wheel has caused a revolution in China's rhinestone grinding and will have a huge impact on the development of China's rhinestone and jewelry industry.