$ sudo apt-get update
$ sudo apt-get install ibus-sunpinyin 

ibus-sunpinyin is installed in your system.

Make ensure the ibus-sunpinyin package were installed using the commands given below,

$ sudo dpkg-query -l | grep ibus-sunpinyin *

You will get with ibus-sunpinyin package name, version, architecture and description in a table

ibus-sunpinyin package basic information: