Wait for me. Who was Ms. Xia born?

Wait for me. Ms. Xia is a cousin. In the variety show Wait for Me, the daughter of a lady wearing an emerald bracelet is unknown. The woman wearing a green bracelet is called Xia. Xia seeks her life through her father and begins to suspect that her cousin is her real mother. She found a cousin in Yunnan. She is her biological mother. She handed a letter and finally found it.