Mr. Chen had no other sons, so he showed more patience towards his frail and sickly son. After all, having this son meant he wasn't unable to pass on the family line; it's just that his son wasn't promising.
Miss Chen and her brother were not favored by Mr. Chen, but as the only son and daughter, their days were still manageable.
Miss Chen's brother was tall, but his face was sickly pale, and his body was so thin it seemed a gust of wind could blow him away, giving the impression of fragility.
Miss Chen was very concerned about her brother, not only checking on his clothing, food, accommodations, and travels but also reprimanding the servants attending to him, ensuring they didn't neglect their master.
Miss Chen's brother was too weak, spending most of his days bedridden and unable to manage his servants.
