Losing money in the crypto world isn't the worst part; the worst part is dying without a clear explanation. Have you ever thought that your liquidation might just be because the price data was delayed by 3 seconds? The SSR equipment you can never seem to get might just be because the random number generation was "manipulated"?

Ultimately, the problem lies here: we trust the blockchain, yet it operates on a bunch of "lying" data sources.

Today, I want to talk about the APRO project, which, to some extent, is a group of tech geeks tortured by dirty data for years, trying to become the "garbage collector" of data in the crypto world.

**The story begins with the most basic pain points**

Several co-founders come from AI, data engineering, and early DeFi backgrounds. They’ve been burned many times by junk data when developing projects: delayed market push notifications, crashing data sources, seemingly predictable random numbers... They gradually realized that no matter how sophisticated your smart contracts are, if the input data itself is flawed, the final output can only be garbage. Instead of dreaming about grand scenarios, it’s better to honestly solve the first problem: how to provide the blockchain with "clean, real-time, trustworthy" data?

In the early stages, resources were tight, and the project had little visibility. The team simply focused on honing their technology.

**Realistic architecture design**

On-chain everything? Too expensive and slow, not practical at all. Fully off-chain? Then what’s the difference from building a centralized database? APRO’s approach is very pragmatic — let off-chain AI act as a "scout," using algorithms to efficiently and quickly scan massive amounts of data, identify abnormal fluctuations; then, a verification mechanism on the chain acts as a "judge" to finally confirm data validity. This hybrid solution strikes a balance between cost and speed.