Such disasters and crises not only endanger people's lives and property, but also test the government's emergency response capability.

Do not needlessly endanger your lives until I give you the signal.

With such a large population of 1.3 billion, the Chinese government faces a harsh challenge. Therefore, the making of '24 hours' is very necessary and in demand.

Hurricane Katrina was the most significant test of our new national emergency preparedness and response system since 9/11 and it obviously did not pass the test,

Hurricane Katrina was in one sense the most significant test of the new national emergency preparedness and response system that was created after 9-11, and it obviously did not pass that test,

Hurricane Katrina was in one sense the most significant test of the new national emergency-preparedness and -response system that was created after 9/11, and it obviously did not pass that test,