Hi currently I try to build EOS and I run the step in eos.io. But it seems that my blockchain is testnet not mainnet, anyone know how to build EOS Mainnet ?
There is only one mainnnet. Any blockchain you create with eos.io will be a testnet and separate blockchain. If you want to run a mainnet node, follow this post: https://medium.com/@cc32d9/running-a-full-eos-mainnet-node-d7da2d3b154f. Note that it may be out of date. If you just want to interact the mainnet, you simply need to connect to a block producer’s API with cleos.