Pinyin:
yī shì yī, èr shì èr
Meaning:
形容对事情认真，一丝不苟。
handle affairs with an earnest and rigorous attitude
Character breakdown and explanation:
一：one
是：is
二：two
“一” represents a situation and “二” represents another situation; to describe something as it really is: one is one and two is two. The phrase describes an attitude towards doing something that's unequivocal and methodistic.
Example sentences:
他评价人和事能够做到一是一，二是二，好的绝不会说成坏的，坏的也绝不会说成好的。
Tā pínɡjià rén hé shì nénɡɡòu zuò dào yī shì yī, èr shì èr, hǎo de jué bú huì shuō chénɡ huài de, huài de yě jué bú huì shuō chénɡ hǎo de.
His assessment of people and things can be unequivocal and meticulous. He'll never call something good as bad and never something bad as good.
她办事一点也不敷衍，一是一，二是二。
Tā bànshì yìdiǎnr yě bù fūyǎn, yī shì yī, èr shì èr.
She always handles affairs with a call-a-spade-a-spade attitude.
