
Well it was kinda getting obvious with all the signs that Wowo may be related to him especially when one of the doctors(I think they were close friends) said that Wowo looked like him even when Qu Cheng was at the same age. The doctor advised him to get a DNA test done and it proved positive. He was still in shock of course but never intended to do anything bad to Ci Nian even if he hid this big secret. He looked at Wowo with fatherly love. Wowo was at the hospital at the time, unconscious and Qu Cheng would visit everytime but when Wowo finally woke up, Qu Cheng did not visit for a few days which seemed suspicious to Ci Nian.(Qu Cheng did not visit for those few days because of the shock but he finally got the courage to visit Wowo) He confronts Ci Nian after a few days and they talk it out, the three got closer as a family.
Aslo: There may be details I left out but this is my basic summary of what happened.
Spoilers ahead, part 2!!!!
(You have been warned)
From what I understood from the roughly translated novel, Xu Xin Nian(the one we know today) is confirmed to not actually be a son of the Xu family. His real brother was different from that slut. He ended up in Ah Si's arms and he took care of him(This part is confusing to explain but Xin Nian(real) was "stalking" Ci Nian but Ci Nian felt a presence that he was being followed and alerted Cheng, he order Ah Si to take care of it etc.) I think they even developed feelings for each other, idk it was kinda confusing. Ah Si brings him so he can introduce himself as Ci Nian's younger brother. Both brothers have met in the past but Xin Nian recalls the day when Ci Nian treated him so well even if he didn't knew him. He gives him a handkerchief that Ci Nian gave in the past and even a wedding gift, handmade with a small knife. Ci Nian understood the meaning of it and cried when he finally met his real brother. Xin Nian was actually scared at the possibility Ci Nian wouldn't accept him because of what happened with the fake Xin Nian but he still accepted him with open arms.
Ps: There could be wrong parts in this since it was only translated by google. Feel free to correct me.