[raincole]

It's a very famous (classical) Chinese phrase.

Both translations don't catch the meaning well though. It means: "worry before the rest of the world (notice that they have something to) worry." The next part is 後天下之樂而樂("be happy only after the rest of the world is happy.")

I don't know why it's a prompt example.

[jdthedisciple]

Sibling comment has the second part as

后天下之乐而乐

which one is correct?

[raincole]

Traditional vs Simplified Chinese.

There are two (modern) "spellings" of written Chinese. Basically colour vs color.

[Y_Y]

It depends on who you think is the rightful successor to the Qing dynasty

[emptyhandeddev]

Wrong. It merely depends on whether the local policy maker before computer age prioritize reducing illiteracy and convenience over other considerations.

Macau, HK and Taiwan uses traditional Chinese character.

Mainland China, Singapore, Malaysia use simplified Chinese character.

Japan uses its own version, some simplified, some traditional, and also invented over 100 Japanese-made-Kanji following the same logic how Chinese characters are formed.

As a matter of fact, simplification of Chinese characters started when KMT/Republic of China was in control of the whole China. Politics gets in the way later and RoC stopped this simplification process while PRC kept it going, Macau & HK were not involved since the Portuguese and British colonial government doesn't care. Singapore and Malaysia pick the simplified version out of convenience.