• Login user and password

Distribution   | Username   | Password
---------------|------------|-------------
Debian Squeeze | pi         | raspberry
Arch           | root       | root
QtonPi         | root       | rootme
Raspbian       | pi         | raspberry
OpenElec       | root       | openelec

• Mirror site at Tsinghua

deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ wheezy main contrib non-free

• 中文支持和输入法：http://blog.csdn.net/c80486/article/details/8460321 或者 https://community.arm.com/cn/b/blog/posts/raspberrypi3-0x03

• Change default editor:

update-alternatives --config editor

• Change timezone

dpkg-reconfigure tzdata

Or check: https://wiki.debian.org/TimeZoneChanges

• Change keyboard layout: edit /etc/default/keyboard