In the crypto world, you realize that things like technology, news, and mentality are actually虚的. The real killer is often a question most people haven't thought of — are the data your smart contract sees reliable?

Imagine this scenario: you spend a lot of money installing a world-class autonomous driving system, code flawless, capable of executing any command automatically. But what about the navigation system responsible for reporting traffic conditions? It might be deaf and blind, or even intentionally lead you off a cliff. This is the problem with oracles.

**Blockchains are inherently blind**

What’s the current price of Bitcoin? How much is your mortgage worth? Who won the last race? The blockchain doesn’t know any of this. It’s like a child locked inside a box, completely unfamiliar with the outside world. So it needs a "information broker" (that’s an oracle) to report intelligence.

The key question is: what if this information broker is late? What if it lies outright? Your position could be wrongly liquidated, the token you bought might be worthless, or even worse things could happen. That’s why in DeFi, GameFi, and NFT sectors, you often see people losing everything — on the surface, it’s market volatility, but in reality, it might all be due to this link.

**Someone wants to fix this loophole**

There’s a project called APRO, which aims to build a "bulletproof data fortress." Instead of copying data from a single source, it cross-verifies data from hundreds of sources worldwide. In other words, it makes lying economically unfeasible. Multiple data sources falsifying data at the same time? The cost is too high. This greatly reduces the risk of manipulation.

Of course, can this completely solve the problem? Not necessarily. But at least it recognizes this critical issue and takes targeted action — which already surpasses most projects.