O2&B is a company that designs and manufactures water filtration systems, featuring fully automatic technology, process monitoring technology, customized community water supply installation technology, MCDI purification technology, and CDI community technology, specializing in small village water supply installations worldwide. The PURI/02 blockchain system established by O2&B holds the core value of 1:1 value exchange. The cryptocurrencies and coins received via the blockchain by individuals will be traded on the international water market, including the entire process from the final system to large-scale plants, which will be controlled by the same blockchain.