Lin Siyi's best friend from high school through university and graduate school. They both joined the same local accounting firm after graduation but ended up in different departments. Song Yunxiao is mentored by Zhao Jie. She drives a black Volkswagen bought by her family. She works long overtime hours (9-9-5 schedule) and complains about her deteriorating health from overwork. She and Lin Siyi have a habit of drinking Wangzai milk with hot pot since high school. She is 158 cm tall.
