China continues to battle COVID flare-ups using its 'zero-COVID' policy. Yet, the COVID-19 epidemic spread shows no signs of ending. Recently, China's northwestern city of Xi'an has been hit by Omicron BA.5.2 subvariant, with 18 Covid infections recorded from Saturday to Monday. This new Omicron subvariant was also found in Beijing. Since then, epidemic prevention and control measures have tightened in the capital of China. And a protest then broke out.