```
Using the strength of his fingers to flick out the silver needle, and accurately hitting the acupoint, is not something an ordinary person can do, let alone the fact that this needle must conceal many mysteries; otherwise, Zhao Angu wouldn't have fallen asleep in a second.
This flicked needle is indeed extraordinary.
Shen Feng did not use the flicking method to show off.
When he had just flicked the silver needle, he had channeled spiritual energy into it. Through the force of the flick hitting the acupoint, the spiritual energy would instantly surge into the depths of Zhao Angu's brain.
No matter the cause of his insomnia, it would allow him to fall asleep in about a second.
Once the spiritual energy inside the silver needle wandered deep into his brain, it would make his subconscious remember this state of sleep, enabling him to easily enter deep sleep in the future.