And 1 is used at the end of a sentence or in a sentence to express judgment, doubt or pause. Wulitou case & gt "Southern ghost, Tianchi also." 2 connecting the preceding with the following, with the same meaning. It's the same as today's 3. Example > "If a flower is not a flower, no one will regret it" is used at the end of the sentence to express the tone of the statement. Equivalent to modern Chinese. & lt< Master Zhuangzi >> "I worked with my sword for nineteen years and solved thousands of cows." Once again, the sigh tone & gt "Those who survived drag out an ignoble existence, and those who died are long gone!" But the meaning is a little too much. If it's convenient for you, just ask. I'll send it to you. It's inconvenient for me to use my mobile phone.