In the academic community, little work has been done to discuss the Ping-ze format in ze tonal rhyme metrical verse specially.

The four types of tonal patterns of the metrical verse of four five-character lines have five rules to go by. And all the sixteen forms of metrical verses can be deduced from those five rules.

They follow certain rules and have formed four patterns. The methods of "filling", "deducing" and "mnemonical rhymes" can be used to master and learn to use the patterns of level and oblique tones.