Wang Teng didn't chase after the silver-haired girl. She was too fast. He would have a hard time catching up to her, even if he used his Space Flash.
She somehow turned into a beam of light, traveling just as fast as light itself.
That footwork was probably a unique light-element technique; strange and powerful.
If his guess was right, it could last longer than his Space Flash.
The latter was a short distance footwork move that relied on a warrior's explosive power. On the other hand, the girl's technique allowed her to keep her light state for a long time, allowing her to escape while in light ray form.
Wang Teng had space power, so he was confident he could eventually catch up.
However, there was no need for that.
It would be a needless hassle.
He would rather spend time searching for better things on the planet than waste effort fighting with her.