ibus-pinyin software package provides Pinyin engine for IBus, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install ibus-pinyin
ibus-pinyin is installed in your system.
Make ensure the ibus-pinyin package were installed using the commands given below,
$ sudo dpkg-query -l | grep ibus-pinyin *
You will get with ibus-pinyin package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | ibus-pinyin |
| Version | 1.5.0-3.1 |
| Description | Pinyin engine for IBus |
| Sub Section | Utils |