What Happened to the Fake Young Masters in the End?

[Blurb from the top's perspective] The son the Wen family had raised for more than twenty years turned out to have been switched at birth! Years later, this news still held its place at the top of S City's gossip headlines, a favorite topic over tea and dinner. Wen Zheng grew up abroad and first met his other uncle at his maternal uncle's funeral. Wen Zheng was a good actor, but only in front of Wen Ling did he reveal his true nature. And only Wen Ling would tolerate him without limits. [Reading Guide] 1. Older, indulgent bottom vs. handsome, scheming top 2. The story has both top and bottom perspectives. I haven't decided how to label them yet. 3. The top and bottom are nine years apart and are not related by blood. 4. The top has a crush on the bottom, and later the feelings become mutual. Theme: The meaning of life lies in striving