wait so I rourou actually related to yi yun??? What-

Nope rourou is Jinyao's child by blood
While yi yun has another baby it will be revealed in upcoming chapters

no dont worry! rourou is not yi yun's biological child, but there is going to be another child coming that will!! ε=ε=(ノ≧∇≦)ノ

Yi Yun technically isn’t related to Rou Rou but he has been with him since he was born,, I think he even hung out with the surrogate mother while she was pregnant with Rou Rou ^^