不久 (bù jiǔ): Not long (after) (Adjective) — Meaning & Stroke Order

Not long after, he tried that method again.

Although we haven't known each other for long, we already have a deep understanding of each other.

He promised not to make the same mistake again, but soon broke his word once more.

Although we haven't known each other long, there's no need to feel distant or reserved when interacting.