- 古时候 gǔshíhou ancient timesancient times; in olden days
- 上古时代 shànggǔshídài ancient timesthe remote past; high antiquity; the earliest period of history
- 中古时代 zhōnggǔshídài Middle Agesthe medieval period of history or the Middle Ages
- 远古时代 yuǎngǔshídài ancient timesThe earliest period of human history; remote antiquity