I. Introduction  
II. Go Deep into PAEs  
A. Overview  
B. The Key Particularities among PAEs  
C. The Critical Attributes of PAEs  
D. The Definition of PAEs  
III. Classify Physical Adversarial Examples  
A. Overview  
B. The Manufacturing Process Oriented PAEs  
C. The Re-sampling Process Oriented PAEs  
D. Other PAE Topics  
IV. Confront Physical Adversarial Examples  
A. Defend against PAEs  
B. The Challenges of PAEs  
C. The Opportunities of PAEs  
V. Conclusions