In China, it's believed that good fortune enters your life through your front door. Just before the New Year, Chinese people follow a tradition of thoroughly cleaning their homes to bid farewell to the previous year, but to avoid sweeping all that good luck out, the home is swept inward and collected in a pile to be carried out the back door, never through the front. In fact, no cleaning is performed at all during the first two days of the New Year so that no good luck can be swept away.
中国人认为好运是从你家前门进来的。在新年之前，他们会彻底打扫卫生，告别过去的一年。为了避免把好运扫走，他们从外往内扫，把尘土扫成一堆再从后门清理出去，绝不走前门。而且，在新年的头两天不能打扫卫生，因为好运会被赶走。