China will not allow any external forces to interfere with Hong Kong and Macao affairs, Chinese President Xi Jinping said in Macao on Friday. 

Xi made the remarks at a celebration of the 20th anniversary of Macao's return to China and inauguration of the fifth-term government of the Macao Special Administrative Region (SAR). 

The Chinese government and the Chinese people's will to safeguard national sovereignty, security and development interests are rock hard, he said.   

"I want to stress here that, after the return of Hong Kong and Macao to the motherland, the affairs of the two special administrative regions are completely China's internal affairs, which need no finger-pointing from any external forces," said Xi. 

He also said that the "One Country, Two Systems" principle, proposed in the 1980s, is feasible, workable and popular with the people. "Of course, the principle needs consistent perfection through practice," he added.  

The undertaking of "One Country, Two Systems" will be perfected and the SARs will be governed in an even better fashion, Xi said.