Mu Qingcheng's beauty was ethereal and timeless, but the same could not be said about Mu Wanrou. The latter could not even hold a candle to the former's little finger.
Hence, when Mu Wanrou was a teenager, Mu Sheng did another DNA test on her.
She somehow caught wind of this matter and hurriedly bought off the Department of Genetics to tamper with the DNA test result. Mu Sheng was kept in the dark regarding this and could only lament the permanent loss of Mu Qingcheng's beauty.
Mu Yazhe, who knew the truth, got a hold of the real DNA test result before Mu Wanrou could have it falsified. He got proof that she was a fraud.
The pathetic Mu Wanrou had been penny-wise and pound-foolish.
She thought that a simple doctoring of the result could put wool over everyone's eyes and hide her identity so she could continue with her masquerade as Mu Qingcheng's daughter.