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                                            Centralization of power
                                        
                                        
                                         
                                    
                                        
                                            
                                            Establishment of imperial examination system
                                        
                                        
                                         
                                    
                                        
                                            
                                            Expansion into Korea, Vietnam, and Central Asia
                                        
                                        
                                         
                                    
                                        
                                            
                                            Military campaigns against Xiongnu
                                        
                                        
                                         
                                    
                                        
                                            
                                            Promotion of Confucianism
                                        
                                        
                                         
                                    
                                        
                                            
                                            State monopolies on salt and iron
                                        
                                        
                                         
                                    
                                        
                                            
                                            Suppression of regional kings
                                        
                                        
                                         
                                    
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