As the eldest brother, he has been in the Southern District for so many years, with few opportunities to return home. Not to mention staying home for long periods; now only by using sick leave and bereavement leave together can he stay for such a long time.
Su Jiang actually feels a bit guilty about this family; he has spent his whole life serving the people. He hasn't cared enough about the family, his sister ended up like this, and there are many things about his brother that he couldn't really influence anymore.
In fact, not finding Su Yun for so long is partly because Su Yun has been staying at the teahouse without stepping out. Li Xia covered for her well, as long as she didn't go out and Li Xia didn't expose her, Su Yun could keep hiding.
Secondly, it's because Su Jiang hadn't given a strict order to search for her; if he had really searched every inch, it wouldn't have been so long without finding her.
