After Dressing up as a Heroine, She Continues to Work for the System

[No CP + system + female protagonist is self-reliant + no female competition + there is a male character with a single arrow but the female protagonist is focused on completing system tasks and her own career] When she woke up, the social animal Cheng Miao entered a period novel and became the daughter of a wealthy family (cannon fodder female version). The bound system told her that if she wanted to return to modern times and find the secret of her bizarre time travel, she must work for the system, complete KPIs, change the fate of the original owner, and reach the pinnacle of life. Although they clearly have the system in hand, they still have to live up to the rhythm of modern workers in the 1990s. It's not easy. As the tasks are completed one by one, the truth gets closer and closer to Cheng Miao. When she finally accumulates enough points and opens the door to modern times, is truth and freedom waiting for her, or is it another larger "system"?