Sentence上に
Usage
The conjunction 上に introduces additional information emphatically. In addition to-; besides -; not only - but also;
Examples
最近の子供は、外で遊ばない上に本も読まないらしい。
It seems that recently, children not only don't play outside but also don't read books.
このクラスは毎月試験がある上に宿題もたくさんあるから、とても大変だ。
This class is very challenging because it not only has exams every month but also a lot of homework.