Chinese learners move from characters to idioms as the highest level. This free resource explains 「石爛海枯」 below.
The Chinese idiom we are introducing this time is 「石爛海枯」. You can find its meaning and application outlined below.
Until the rocks turn to soil and the sea dries up. A metaphor for permanence.
The Mandarin pronunciation of this idiom is :
shí làn hǎi kū
while its Cantonese pinyin is :
sek6 laan6 hoi2 fu1
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.

