Hi! I think it was not actually a Sentiment. Sentiment is a strand of a soul of a being who died with regrets, but Qian Li was still alive after leaving her sect — she ascended to the Tenth World and participated in an all-female Ultimate Expedition (chapter 1786).
Most likely she left part of her soul in the sect to protect it, similar to have part of Min Ren's soul was left in his self-portrait and was summoned by Su Yonghuang's blood. Or how Fei Yang's soul appeared (alongside 12 other Emperors' souls) to help Li Qiye destroy Ancestral Domain in the Sacred Nether World, but later on it was mentioned that Fei Yang ascended to the Tenth World. Where were also some other items/techniques that summoned Emperors souls/spirits/auras for a fight/protection.
Found below passage that might be helpful for improving physique articles and their empowering weapons and uses for blood energy. I am not very good at editing so just leaving it here for when you got time. Thanks!
"Possessing boundless blood energy was the same as possessing all things. This was the magical property of the Sacred Spring Physique. It could empower every technique to be extraordinarily powerful with greater speed and weight!
Of course, its speed augmentation was not as great as the Soaring Immortal Physique, its additional weight was no match for the Hell Suppression Physique, and it couldn’t empower something to the level of the Sky Destroyer Physique! Nevertheless, its endless blood energy made each move quite invincible!"