cp /etc/apt/sources.list
cp /etc/apt/sources.d/raspi.list
$ sudo nano /etc/apt/sources.list
#Kedayuan
deb http://mirrors.ustc.edu.cn/raspbian/raspbian/ stretch main contrib non-free rpi
deb-src http://mirrors.ustc.edu.cn/raspbian/raspbian/ stretch main contrib non-free rpi
$ sudo nano /etc/apt/sources .list .d /raspi .list
#Kedayuan
deb http://mirrors.ustc.edu.cn/archive.raspberrypi.org/debian/ stretch main ui
deb-src http://mirrors.ustc.edu.cn/archive.raspberrypi.org/debian/ stretch main ui
University of Science and Technology of China
Raspbian http://mirrors.ustc.edu.cn/raspbian/raspbian/
Alibaba Cloud
Raspbian http://mirrors.aliyun.com/raspbian/raspbian/
Tsinghua University
Raspbian http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/
Huazhong University of Science and Technology
Raspbian http://mirrors.hustunique.com/raspbian/raspbian/
Arch Linux ARM http://mirrors.hustunique.com/archlinuxarm/
South China Agricultural University (South China user)
Raspbian http://mirrors.scau.edu.cn/raspbian/
Dalian Neusoft Information Institute Source (northern users)
Raspbian http://mirrors.neusoft.edu.cn/raspbian/raspbian/
Chongqing University Source (Midwest users)
Raspbian http://mirrors.cqu.edu.cn/Raspbian/raspbian/
Sun Yat-sen University Jumped to University of Science and Technology of China
Raspbian http://mirror.sysu.edu.cn/raspbian/raspbian/
National University of Singapore
Raspbian http://mirror.nus.edu.sg/raspbian/raspbian
Oxford
Raspbian http://mirror.ox.ac.uk/sites/archive.raspbian.org/archive/raspbian/
KAIST University, Korea
Raspbian http://ftp.kaist.ac.kr/raspbian/raspbian/