CRSTK: CRSTK was developed based on RC20 algorithm applying Block chain 3.0 technology and smart contract in issuing CRS coins. The group's cryptocurrency helps make B2B, B2C transactions in the diamond industry in the future. Along with the team of many years of experience in the field of cryptocurrency and the diversity in many business fields , we are fully confident in listing the CRS on the foreign exchange market in Q4 2020