当所有的鸟儿在天空歌唱
[dāng suŏ yŏu de niăo ér zài tiān kōng gē chàng]
When all the birds are singing in the sky. The meaning of this pseudonym is quite poetic; it conveys the idea of happiness, harmony, and freedom associated with birds' chirping melodies against the backdrop of vast blue skies.