Answer:
To is a preposition with several meanings, including “toward” and “until.” Too is an adverb that can mean “excessively” or “also.” Just to be clear: two is pronounced the same as to and too, but it can't be used instead of either of them because it's a number.
It is traditional for families to clean their houses and the areas surrounding before the start of the new year. The word 'dust' in Chinese is a homophone for 'old', thus cleaning the house is symbolic of driving away the bad luck of the previous year to allow for a new start.
Many primary sources cannot be understood because of the language or they way they have written it. We can't always understand it because its from a culture completely different from our own. Reading primary sources requires your his historical imagination.