Progressing from characters to words and idioms marks advanced Chinese. This guide freely explains 「理所必然」 for your learning.
This time, our spotlight is on the idiom 「理所必然」. Its meaning and how it’s applied are described below.
It means that this should be the case according to reason.
The Mandarin pronunciation of this idiom is :
lǐ suǒ bì rán
while its Cantonese pinyin is :
lei5 so2 bit1 yin4
The vastness of Chinese idioms, with their many meanings and applications, is inspiring. We hope these resources will guide you in your language-learning adventure.

