I'm Not the Heir.

After years apart, Ding Duocai returns home only to find that his father no longer remembers him. His jealousy grows as he notices a close bond between his father and insurance agent Gu Liulian, who appears to share a father-daughter relationship with him. However, as they compete for the father's attention, their original intentions soften. In the warmth of a father’s love, the two begin to heal past wounds and ultimately rediscover happiness together.