十室九空 shíshì-jiǔkōng
[nine houses out of ten are deserted;almost all houses empty after the raid] 十户人家,九家空虚。形容因灾荒、战乱或暴政使得人民破产或流亡的景象。现在有时也用来形容人们不认真上班,办公室无一人的状况