Xie and Han both have four tones. Why is the horizontal tone different? I searched online for a long time, but Yin Ping couldn't understand it at all. Can a flat tone be distinguished by the tone of M

Xie and Han both have four tones. Why is the horizontal tone different? I searched online for a long time, but Yin Ping couldn't understand it at all. Can a flat tone be distinguished by the tone of Mandarin? The use of Putonghua in a level tone can't be completely distinguished. Poems written by poets in the past, we don't rhyme, but are actually bets. Solution: Solution rhymes with Han Han, meaning the third sound. If you want to bet on rhymes, it should be written by Jie Li ... Bet on ie rhymes; Han, it's ... Bet rhymes.