# Chapter 5: Illustrative examples

Author: tu Junjie (WeChat account: ffeels))

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The [TimeTrack](http://timetrack.io/) and [aTimeLogger](http://www.atimelogger.com/) software used in this paper are independently developed by @ Sergei Zaplitny.

For payment of [TimeLogger & TimeTrack](https://shijian.tujunjie.com/ch06/ch06.47#wo-yong-an-zhuo-timetrack-dan-shi-wu-fa-sheng-ji-zen-me-jie-jue), please scan the code:

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