What is disloyal, unfilial, heartless and unjust?

upper part: faithless, faithless, rude and uncorrupted

semantically, "faithless, faithless, uncorrupted and uncorrupted" can be used as the upper part and the lower part,

but considering the rhyming of flat words, "faithless, uncorrupted and uncorrupted" can only be used as the upper part.

Method of couplets:

First of all, the number of words is equal, secondly, the meaning is relative or inherited, and thirdly, the part of speech is relative, such as noun to noun, verb to verb, color word to color word, and then the structure is corresponding. For example, the upper part is the subject-predicate object, and the lower part is also the subject-predicate object, and the rhythm should be consistent. For example, the upper part is the rhythm of 223, and the lower part should also be 223. "Qingshan is fortunate. There is also the relationship between flat and even tones. "Flat" is the first and second tones in Chinese Pinyin, and flat is the third and fourth tones. The basic requirement of leveling is that if the last word of the upper couplet is flat, the last word of the lower couplet must be flat.