WIW is one of the blue-chip dApps using zk to preserve identity and manage the reputation of people on-chain. WIW stores all its users' data on a decentralized file storage system called IPFS. Everyone can create a profile on WIW. In turn, WIW has a search portal where the profile tag of anyone can be queried, thereby making the on-chain reputation of everyone available. Developers can also build dApps and infrastructures with the authorized and public APIs of WIW, which are quite easy to integrate.