I'll give you some personal ideas for your reference:

1, first of all, it depends on what kind of foreigners your PPT audience is, such as foreign classmates and foreign tourists who come to China with very different interests; And what major do international students rely on, social science? Humanities? Or science and engineering? Their points of interest and degree of interest in China will also be significantly different.

2. Generally speaking, foreigners' interests in understanding China mostly involve: the general situation of China, the history and traditional culture of China, the scenic spots in China, the delicious food in China and the unique folk activities in China. The details of each part can be adjusted according to the characteristics of the audience. If the audience is students of humanities, you can add some content about China's history, culture and folk customs; If you are a tourist, you can add some content about scenic spots, folk activities and food; If you study economics, you can even briefly introduce China's economy and industry; If you study political diplomacy, you can certainly introduce China's foreign policy and political structure.

In a word, it is not difficult to complete this task, but to complete it well, it must be based on a deep understanding of the audience, so as not to generalize.