The main reason is that Chen Jiajia has a pair of good parents, not an incompetent father like Jin Jiajun. So she has a good personality and is completely unaffected by her parents' divorce. According to Chen Jiajia's mother, Ping Li, it was because she felt that she owed her daughter a divorce from her father that she was kind to his daughter and compensated her twice. Chen Zhuo also gave her a good education. She is really nice to Chen Jiajia, because she is basically responsive.
Chen Jiajia's father is more suitable for Chen Jiajia. After divorcing Chen Jiajia's mother, Chen Zhuo never remarried. Instead, he chose to live with Chen Jiajia, cook for her and give Chen Jiajia psychological education. Therefore, Chen Zhuo played a great role in the formation of her daughter's personality. He educated his daughter in the right way and gave her enough love, including her mother's love for Chen Jiajia. Even with her parents, she loves more. In this case, Chen Jiajia's character will not have any defects. Because of her father's love and maternal love, she doesn't lack much. Naturally, her personality will be better.