$ apt-cache policy libpoppler-glib8
libpoppler-glib8:
  Installed: 0.62.0-2ubuntu2.1
  Candidate: 0.62.0-2ubuntu2.1
  Version table:
 *** 0.62.0-2ubuntu2.1 500
        500 http://mirrors.tuna.tsinghua.edu.cn/ubuntu bionic-updates/main amd64 Packages
        500 http://mirrors.tuna.tsinghua.edu.cn/ubuntu bionic-security/main amd64 Packages
        100 /var/lib/dpkg/status
     0.62.0-2ubuntu2 500
        500 http://mirrors.tuna.tsinghua.edu.cn/ubuntu bionic/main amd64 Packages