T: 親生 S: 亲生 [qin1 sheng1] = one's own, born to oneself, having born oneself
他把外甥當自己的親生骨肉一樣疼愛。
他把外甥当自己的亲生骨肉一样疼爱。
ta1 ba3 wai4 sheng1 dang1 zi4 ji3 de5 qin1 sheng1 gu3 rou4 yi2 yang4 teng2 ai4.
He loved his nephew as though he were his own child.
https://www.learnwitholiver.com/chinese/daily-sentence-2312