留得青山在不怕没柴烧

留得青山在,不怕没柴烧

Literally means:

as long as green mountains remain, there is no need to worry about firewood

Actually means:

where there is life, there is hope

It figuratively means that as long as people survive for forces and conserved, there will be opportunities for revival and development. It is often used to show when facing a difficulty, one's life or a certain foundation is essential for future revival

比喻只要人活下来或力量保存下来，将来就有机会恢复和发展。多用来说明，当面临困境或危难必须有所牺牲时，人的生命或有助于日后求得恢复的基础一定不能舍弃。