Imagine blockchain like your most rule-abiding roommate: they split the rent down to the penny and never haggle. The problem is, this guy completely ignores the world outside the ledger.

A smart contract can seamlessly execute a $10,000 loan... but if the Bitcoin price it references comes from a hacked exchange or a typo-ridden website, the entire transaction becomes a disaster. This is not just a data error issue, but a trust crisis in the entire on-chain financial system.

That's why projects like APRO exist. It’s not just an ordinary data transmitter, but a guardian of data in the Web3 world. It builds a trusted bridge between smart contracts and real-world data, ensuring that the foundational information for each contract execution is accurate. For the DeFi ecosystem, such a reliable data source is like a pacemaker in the heart — without it, the entire system cannot beat properly.