Gu Xiaonuan's stubbornness, Li Lu's stubbornness—they both have their own opinions when it comes to personal emotions.
Even Gu Xiaonuan thought this way, so how could Li Lu possibly be persuaded?
Besides, Gu Xiaonuan and Li Lu have been friends for so many years, so as friends, they certainly understand each other's personalities well.
Now, even though Gu Xiaonuan and Li Lu have differing opinions, they don't want to quarrel with each other over their respective men.
Gu Xiaonuan failed to convince Li Lu, and Li Lu likewise couldn't persuade Gu Xiaonuan.
Gu Xiaonuan wouldn't even try to make Li Lu understand her, since she couldn't understand Li Lu herself. How could Li Lu possibly understand her?
Li Lu couldn't understand Gu Xiaonuan either, but when it comes to emotions, it's like drinking water—only the person knows its warmth or coolness. If Gu Xiaonuan feels that Si Yuchen isn't suitable for her, then she really has no way to convince Gu Xiaonuan otherwise.