qì / fù / suī / rán / bú / shì / wǒ / de / qīn / shēng / fù / qīn / dàn / duì / wǒ / fēi / cháng / hǎo

契父虽然不是我的亲生父亲，但对我非常好。

Although my godfather is not my biological father, he treats me very well.