Travel Through Time and Become a Second-Grade Daughter

After taking a nap in the Forbidden City, I woke up and found that I had traveled through time and became the daughter of the Grand Tutor. The late emperor made some random connections and pointed her out to Prince Jing, who was in love with the prime minister's daughter. He is very proud to be the father of a princess, but he has a beautiful "ex" in front of him and a domineering love rival in the back, and the prince is still an iceberg man! Who will tell her how she can warm him? The male protagonist is dull, the male partner is infatuated, and what choice should she make if she is devoted? It's all in "Traveling to Become a Second-Rank Daughter of Gold"