大单小单大双小双公式

简介：Tang Bohu sighed and said: My father often told me when he was alive that although I was very perceptive, smart and easy to learn, and proficient in all kinds of poetry, my temper was lazy, bold and unrestrained, and I was not suitable for entering the officialdom. He often advised me not to get involved in this way. , otherwise it will cause big trouble!