积土而为山，积水而为海 | jī tǔ ér wéi shān, jī shuǐ ér wéi hǎi

This quote from Xi Jinping was delivered in 2018, but is being highlighted again for 中秋节 in this short 2-minute video.

Meaning: pile up soil to form mountains, and collect water to form seas; a metaphor of accumulation from less into more.

Original: “积土而为山，积水而为海，幸福和美好未来不会自己出现，成功属于勇毅而笃行的人。”