A doctor and Xu Suyu's colleague in the hospital department. She and Han Shumo were top competitors in their cohort. Initially cold and dismissive toward Xu Suyu, believing she only got her position through connections, Song Yanling changes her opinion after witnessing Xu Suyu's medical skill and sense of justice. She becomes friendly and considers Xu Suyu a friend. She is described as straightforward, hearty, and taking responsibility for mistakes, though she calls herself the department troublemaker.
