How to distinguish the flat and level tones in ancient poetry?

Cleverly remember the formula of flat and uniform tone:

1, rhymes:

Five laws are equal: the first word and the second word of the first sentence are flat. The five laws start from the beginning: the first word and the second word of the first sentence are silent.

Flat (rhyming)

Seven laws are equal: the second word of the first sentence must be flat. Starting with the seven laws: the second word of the first sentence must be linked.

2. quatrains:

The first sentence rhymes with the first sentence. The first sentence rhymes with the first sentence. The first sentence of this quatrain rhymes. The first sentence of the four wonders doesn't rhyme.

The first sentence rhymes with five absolute equality. The first sentence doesn't rhyme. The first sentence rhymes from five poems. The first sentence of these five poems doesn't rhyme.

The four tones of Putonghua are divided into flat tone, rising tone, rising tone and falling tone. In ancient times, the "flat voice" of Putonghua was divided into Yin Ping and Yang Ping. In ancient times, the tone of "Shang Sheng" was partly disyllabic and partly Shang Sheng in Mandarin.