Literature Reference: If you remember old friends from Xihe, the fish tally should allow passage through Hangu Pass. Source from 'Daoyi Dayin Cunzhi Tingmei Er Xueshi Jian Yu Shengming Zi Zhi Xiaohan Jie Yu She Di Xi Nian Huanwang Mu Zhi Li Qiong Cui Qie Yu Yi Hui Shu Mei Ge Shi Jian Yan Zhi Yin Cheng Changju Si Yun Cheng Shang San Junzi' by Du Mu.
鱼:
Fish. When used in a name, it symbolizes a bright future and carries the meaning of prosperity and auspiciousness.
符: Surname. Mark, symbol.
Meaning: The fish tally, an ancient symbol of official identity, represents trust and authority.