It's not firsthand information.

那不是第一手资料。

youdao

We should acquire more firsthand information.

我们应当取得更多的第一手资料。

youdao

We have a great amount of firsthand information.

我们有大量的第一手资料。

youdao

We have all witnessed firsthand how the free flow of information is impacting the way individuals and companies communicate and how the rules of governance are changing for entire nations.

FORBES: How Al Jazeera Successfully Managed Through The Turmoil

Firsthand sources: The best way to ensure information is correct is to take it from the horse's mouth.

CNN: Locating sources and fact-checking