Did Emperor Qianlong sleep with his own daughter?

In Princess Huanzhu, the swallow entered the palace instead of Wei Zi, and Qianlong had affection for the swallow, not for men and women. After the swallow loved her, she was named Princess Pearl, and Wei Zi and Jin Suo were put into the palace as maids. Because Wei Zi was talented and so smart, Qianlong had a crush on Wei Zi from the beginning, but he didn't know that Wei Zi was his own daughter.