There is an unavoidable challenge in blockchain: no matter how secure the ledger is, it cannot access off-chain data. Price fluctuations, sports event results, weather information, logistics progress... these real-world data points are completely inaccessible to smart contracts. The existence of this information silo limits the imagination space for blockchain applications.

How did the old generation of oracles operate? Basically, they acted like messengers, going to find information and then relaying it to you. The problem is obvious—relying on a single data source makes it vulnerable to attacks and bribery. Once compromised, the entire system becomes a factory of lies.

APRO's approach is entirely different. It no longer depends on a single messenger but instead builds a "decentralized data council." How to understand this? Multiple independent data source nodes simultaneously collect information, then verify it through distributed voting, and finally, AI models monitor anomalies and manipulation behaviors in real-time. Data is not simply transported; it undergoes a rigorous "public trial."

This system introduces two usage modes, each with its own advantages.

**Real-time Push Mode** is suitable for scenarios with zero tolerance for latency. Market prices, event results, trading signals—any change can be instantly synchronized to the chain. Time-sensitive operations like DeFi liquidations and high-frequency trading no longer need to worry about "unexpected losses" caused by data delays.

**On-demand Pull Mode** aims to reduce costs. Applications only call data when needed, avoiding idle traffic fees. Low-frequency scenarios like insurance claim verification and property valuation can cut costs by half directly.

Developers can now truly balance "timeliness" and "economics" for the first time, flexibly choosing based on business needs, without being forced into compromises. This is what an oracle should look like.