How did Ruiying know that Riliying was her sister in Miss Mermaid?

Yaliying knew Ruiying was crazy and felt guilty, so she went to Paris. She was stopped by Wang Zhu at the airport for the first time and left for the second time. Wang Zhu had no choice but to visit Ruiying who was seriously ill and take good care of her. After Ruiying recovers, they are going to get married.

On the day before the wedding, Zhao Xiue sent an anonymous short message to tell Wang Zhu's mother that Yaliying was Ruiying's own sister and asked them to prove it themselves. After asking, Wang Zhu's mother and grandmother knew the truth. Wang Zhu's father found Ruiying's father to confirm, and after getting a positive reply, he decided to cancel the wedding on the spot. Shen Xiuzhen fainted after hearing the news and was taken to the hospital by Ruiying. In the hospital, she called her father, and a secretary answered the phone and asked her why she called off the wedding. Ruiying was shocked and went to Wang Zhujia to ask, but Wang Zhu's mother and grandmother didn't tell her.

When Shen Xiuzhen woke up, she thought it was Zhao Xiue's story and went to Xiue's house to tell it. They fought and were stopped by Marin who came back, so Zhao Xiue told Marin about it. At this time, Ruiying called and asked Marin to call Wang Zhu to ask the reason for the cancellation of the wedding. Marin said that she knew they would meet soon. After meeting, Marin told Ruiyingya Liying that it was her sister, and the rest didn't.

There is more to come. ......