Lin Chen was naturally teasing Qiu Wushuang. He was just speaking in anger back then, deliberately provoking Qiu Wushuang, without having any real intention.
Seeing Qiu Wushuang so uneasy, he purposefully teased her a bit, considering the matter settled.
Why did Lin Chen single out Qiu Wushuang to speak and offer to help her?
Zhen Liuxue.
Although Lin Chen had saved Zhen Liuxue's life, even helping her rejuvenate and remain ever youthful, truly stepping into the Half-Saint Realm, Zhen Liuxue has been following Lin Chen since regaining her strength, helping him fend off countless dangers.
Zhen Liuxue herself has no demands now, and even though Lin Chen wants to repay her, he doesn't know where to start. However, Qiu Wushuang is the daughter of Zhen Liuxue's master, and the two share the bond of being apprentice sisters.
It's hard to say what Qiu Wushuang feels for Zhen Liuxue, but Zhen Liuxue definitely considers Qiu Wushuang as a younger sister.
