This impact destroyed human civilization, society, and nations. In such adversity, the resilience and tenacity that humans have developed over millions of years of evolution finally came to the fore. The surviving humans gathered together and, in incredibly difficult circumstances, built isolation barriers.,A deafening and imposing roar erupted, vanishing the smile from Lok Ka-fai's face and replacing it with fury.,The 5th department, Urban Security Management Department, is commonly known as the police.。