公元 (gōng yuán) means “CE (Common Era); Christian Era; AD (Anno Domini)”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
公元前的历史很久远。
Gōngyuán qián de lìshǐ hěn jiǔyuǎn.
The history before AD is very ancient.
Updated: 2026-05-27