"If I had known this, it would be better not to find a relative in the first place!" Uncle Xu once said this, and now I finally understand the depth of what Uncle Xu said.

Uncle Xu believed that searching for a relative could give YC hope of life, but he did not expect that it would hasten YC's death. His biological mother and daughter-in-law refused treatment and sent him away quickly with three cruel refusals. If he had not searched for a relative, YC might have survived with the strength of the Xu family.
The second one is the disappointment in the found nephew and the family. Logically speaking, children who have gone through so much trouble to find them will be doubly cherished, no matter what. Xu Yao's family is very tolerant to outsiders, not to mention their own children, who should be extremely fond of them. If the cake couple hadn't pushed past the bottom line, think about it, it is impossible for an uncle to have such an attitude. It is impossible for an uncle to treat the son that his most beloved sister has worked so hard to bring back for no reason.

It must be that at least my nephew is back, and it’s worth it. But he didn't feel it was worth it. Who would be willing to do this to a child who had been separated for many years, so Uncle Xu had basically seen through the Cake couple. Without doing something that breaks the bottom line, it is impossible for Xu Yao's relatives to do this to a child who has not grown up in their own home for 28 years.
Only a person with no moral character will be rejected and ignored by his relatives.
He does not treat you as a parent or a relative. Because Uncle Xu had real contact with them, he was the first to see clearly and understand the personality of Mr. and Mrs. Cake.
