你走后回忆是我呼吸的氧气
[nĭ zŏu hòu huí yì shì wŏ hū xī de yăng qì]
The meaning is 'After you left, memories have become the oxygen that I breathe.' It implies the feeling after someone important leaves: memories about him/her become very precious and indispensable, like air, as if breathing in these memories can keep living forward. An emotional, nostalgic individual may adopt this name, showing his/her deep sentiment for the past experiences and relationships, even though those people are gone.