Why did Yuan Qingsuo finally choose the warrior Lanling?

Yuan Qingsuo and the soldier Lan Ling are childhood friends, and they really love each other. At the beginning, Yuan Qingsuo married Yu Wenyong in order to get the whereabouts of Soul Beads and Qingluan Mirror. Yuan Qingsuo liked the soldier Lanling from the beginning, so in the end, she helped Yu Wenyong realize a grand plan and lived a happy life with the soldier Lanling after retiring from the army.

Yuan Qingsuo, the "Master of Lanling", whose real name is Duanmu Lian, is the only descendant of the founder Duanmu Yimai. She and the warrior Lan Ling were childhood friends, but later, in order to find the Dragon Sect treasure Qingluan mirror and farewell sword, she pretended to be Yuan Qingsuo, the niece of Mrs. Sikong in the Northern Zhou Dynasty, and later went to Sikongfu in the Northern Zhou Dynasty, during which she met the warriors Lan Ling and Yu Wenyong.

Yuan Qingsuo married Yu Wenyong, one for the sacred object and the other for helping Yu Wenyong. Yuan Qingsuo didn't like Yu Wenyong, but Yu Wenyong gradually fell in love with Yuan Qingsuo. It's a pity that Yuan Qingsuo was the only one in his heart, so after helping Yuwen Yong win the world, he left with him.